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<li id="toc-From_NeXT_Step_to_MacOS_X" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#From_NeXT_Step_to_MacOS_X"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>From NeXT Step to MacOS X</span> </div> </a> <ul id="toc-From_NeXT_Step_to_MacOS_X-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-System_usage" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#System_usage"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>System usage</span> </div> </a> <ul id="toc-System_usage-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Guidelines,_tools_and_methods_for_developers" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Guidelines,_tools_and_methods_for_developers"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Guidelines, tools and methods for developers</span> </div> </a> <ul id="toc-Guidelines,_tools_and_methods_for_developers-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Notes" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Notes"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Notes</span> </div> </a> <ul id="toc-Notes-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span 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data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Cursor on macOS indicating that an application is busy</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><style data-mw-deduplicate="TemplateStyles:r1248332772">.mw-parser-output .multiple-issues-text{width:95%;margin:0.2em 0}.mw-parser-output .multiple-issues-text>.mw-collapsible-content{margin-top:0.3em}.mw-parser-output .compact-ambox .ambox{border:none;border-collapse:collapse;background-color:transparent;margin:0 0 0 1.6em!important;padding:0!important;width:auto;display:block}body.mediawiki .mw-parser-output .compact-ambox .ambox.mbox-small-left{font-size:100%;width:auto;margin:0}.mw-parser-output .compact-ambox .ambox .mbox-text{padding:0!important;margin:0!important}.mw-parser-output .compact-ambox .ambox .mbox-text-span{display:list-item;line-height:1.5em;list-style-type:disc}body.skin-minerva .mw-parser-output .multiple-issues-text>.mw-collapsible-toggle,.mw-parser-output .compact-ambox .ambox .mbox-image,.mw-parser-output .compact-ambox .ambox .mbox-imageright,.mw-parser-output .compact-ambox .ambox .mbox-empty-cell,.mw-parser-output .compact-ambox .hide-when-compact{display:none}</style><table class="box-Multiple_issues plainlinks metadata ambox ambox-content ambox-multiple_issues compact-ambox" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/40px-Ambox_important.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/60px-Ambox_important.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/b/b4/Ambox_important.svg/80px-Ambox_important.svg.png 2x" data-file-width="40" data-file-height="40" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span"><div class="multiple-issues-text mw-collapsible"><b>This article has multiple issues.</b> Please help <b><a href="/wiki/Special:EditPage/Spinning_pinwheel" title="Special:EditPage/Spinning pinwheel">improve it</a></b> or discuss these issues on the <b><a href="/wiki/Talk:Spinning_pinwheel" title="Talk:Spinning pinwheel">talk page</a></b>. <small><i>(<a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove these messages</a>)</i></small> <div class="mw-collapsible-content"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1251242444"><table class="box-More_footnotes_needed plainlinks metadata ambox ambox-style ambox-More_footnotes_needed" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/40px-Text_document_with_red_question_mark.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/60px-Text_document_with_red_question_mark.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a4/Text_document_with_red_question_mark.svg/80px-Text_document_with_red_question_mark.svg.png 2x" data-file-width="48" data-file-height="48" /></span></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article includes a list of <a href="/wiki/Wikipedia:Citing_sources#General_references" title="Wikipedia:Citing sources">general references</a>, but <b>it lacks sufficient corresponding <a href="/wiki/Wikipedia:Citing_sources#Inline_citations" title="Wikipedia:Citing sources">inline citations</a></b>.<span class="hide-when-compact"> Please help to <a href="/wiki/Wikipedia:WikiProject_Reliability" title="Wikipedia:WikiProject Reliability">improve</a> this article by <a href="/wiki/Wikipedia:When_to_cite" title="Wikipedia:When to cite">introducing</a> more precise citations.</span> <span class="date-container"><i>(<span class="date">June 2016</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> </div> </div><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:OS_X_10.11_Beta_Beach_Ball.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7e/OS_X_10.11_Beta_Beach_Ball.jpg/220px-OS_X_10.11_Beta_Beach_Ball.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/7/7e/OS_X_10.11_Beta_Beach_Ball.jpg 1.5x" data-file-width="230" data-file-height="230" /></a><figcaption>Spinning Wait Cursor as seen in <a href="/wiki/OS_X_El_Capitan" title="OS X El Capitan">OS X El Capitan</a></figcaption></figure> <p>The <b>spinning pinwheel</b> is a type of <a href="/wiki/Throbber" title="Throbber">throbber</a> and a variation of the mouse <a href="/wiki/Pointer_(graphical_user_interfaces)" class="mw-redirect" title="Pointer (graphical user interfaces)">pointer</a> used in <a href="/wiki/Apple_Inc." title="Apple Inc.">Apple</a>'s <a href="/wiki/MacOS" title="MacOS">macOS</a> to indicate that an <a href="/wiki/Application_software" title="Application software">application</a> is busy.<sup id="cite_ref-cnet_2005_1-0" class="reference"><a href="#cite_note-cnet_2005-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Officially, the <i>macOS Human Interface Guidelines</i> refer to it as the <b>spinning wait cursor</b>,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> but it is also known by other names. These include, but are not limited to, the <b>spinning <a href="/wiki/Beach_ball" title="Beach ball">beach ball</a></b>,<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> the <b>spinning wheel of death</b>,<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> and the <b>spinning beach ball of death</b>.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="History">History</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=1" title="Edit section: History"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A <a href="/wiki/Watch" title="Watch">wristwatch</a> was used as the first wait cursor in early versions of the <a href="/wiki/Classic_Mac_OS" title="Classic Mac OS">classic Mac OS</a>. Apple's <a href="/wiki/HyperCard" title="HyperCard">HyperCard</a> first popularized animated cursors, including a black-and-white spinning quartered circle resembling a <a href="/wiki/Beach_ball" title="Beach ball">beach ball</a>. The beach-ball cursor was also adopted to indicate running script code in the <a href="/wiki/HyperTalk" title="HyperTalk">HyperTalk</a>-like <a href="/wiki/AppleScript" title="AppleScript">AppleScript</a>. The cursors could be advanced by repeated HyperTalk invocations of "set cursor to busy". </p><p>Wait cursors are activated by applications performing lengthy operations. Some versions of the Apple Installer used an animated "counting hand" cursor. Other applications provided their own theme-appropriate custom cursors, such as a revolving <a href="/wiki/Yin_Yang" class="mw-redirect" title="Yin Yang">Yin Yang</a> symbol, <a href="/wiki/Fetch_(FTP_client)" title="Fetch (FTP client)">Fetch</a>'s running dog, <a href="/wiki/Retrospect_(software)" title="Retrospect (software)">Retrospect</a>'s spinning tape, and <a href="/wiki/Pro_Tools" title="Pro Tools">Pro Tools</a>' tapping fingers. Apple provided the standard interfaces for animating cursors: originally the Cursor Utilities (SpinCursor, RotateCursor)<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> and, in <a href="/wiki/Mac_OS_8" title="Mac OS 8">Mac OS 8</a> and later, the <a href="/wiki/Appearance_Manager" title="Appearance Manager">Appearance Manager</a> (SetAnimatedThemeCursor).<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="From_NeXT_Step_to_MacOS_X">From NeXT Step to MacOS X</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=2" title="Edit section: From NeXT Step to MacOS X"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:NeXTSTEP_WaitCursor_(monochrome).png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/a/a5/NeXTSTEP_WaitCursor_%28monochrome%29.png" decoding="async" width="16" height="16" class="mw-file-element" data-file-width="16" data-file-height="16" /></a><figcaption>NeXTStep monochrome (2 bit)</figcaption></figure> <p><a href="/wiki/NeXTSTEP" title="NeXTSTEP">NeXTStep 1.0</a> used a <a href="/wiki/Monochrome" title="Monochrome">monochrome</a> icon resembling a spinning <a href="/wiki/Magneto-optical_drive" title="Magneto-optical drive">magneto-optical disk</a>.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup> Some NeXT computers included an optical drive, which was often slower than a magnetic hard drive. This made it a common reason for the wait cursor to appear. </p> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:NeXTSTEP_WaitCursor_(color).png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/9/96/NeXTSTEP_WaitCursor_%28color%29.png" decoding="async" width="16" height="16" class="mw-file-element" data-file-width="16" data-file-height="16" /></a><figcaption>NeXTStep color (12 bit)</figcaption></figure> <p>When color support was added in NeXTStep 2.0, color versions of all icons were added. The wait cursor was updated to reflect the bright rainbow surface of these removable disks, and that icon remained, even when <a href="/wiki/NeXTstation" title="NeXTstation">later machines</a> began using hard disk drives as primary storage. Contemporary <a href="/wiki/CD-ROM" title="CD-ROM">CD-ROM</a> drives were even slower (at 1x, 150 kbit/s).<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>b<span class="cite-bracket">]</span></a></sup> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:WaitCursor-300p.gif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/3/3d/WaitCursor-300p.gif" decoding="async" width="84" height="90" class="mw-file-element" data-file-width="84" data-file-height="90" /></a><figcaption>Mac OS X (24 bit)</figcaption></figure> <p>With the arrival of Mac OS X, the wait cursor was often called the "spinning beach ball" in the press,<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> presumably by authors not knowing its NeXT history or relating it to the HyperCard wait cursor. </p><p>The two-dimensional appearance was kept essentially unchanged<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>c<span class="cite-bracket">]</span></a></sup> from NeXT to <a href="/wiki/Rhapsody_(operating_system)" title="Rhapsody (operating system)">Rhapsody</a>/<a href="/wiki/Mac_OS_X_Server_1.0" title="Mac OS X Server 1.0">Mac OS X Server 1.0</a> which otherwise had a user interface design resembling <a href="/wiki/Mac_OS_8" title="Mac OS 8">Mac OS 8</a>/<a href="/wiki/Platinum_(theme)" class="mw-redirect" title="Platinum (theme)">Platinum theme</a>. This continued through <a href="/wiki/Mac_OS_X_10.0" title="Mac OS X 10.0">Mac OS X 10.0/Cheetah</a> and <a href="/wiki/Mac_OS_X_10.1" title="Mac OS X 10.1">Mac OS X 10.1/Puma</a>, which introduced the <a href="/wiki/Aqua_user_interface" class="mw-redirect" title="Aqua user interface">Aqua user interface</a> theme. </p><p><a href="/wiki/Mac_OS_X_10.2" class="mw-redirect" title="Mac OS X 10.2">Mac OS X 10.2/Jaguar</a> gave the cursor a glossy rounded "gumdrop" look in keeping with other <a href="/wiki/Aqua_(user_interface)" title="Aqua (user interface)">OS X interface</a> elements.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> In <a href="/wiki/OS_X_10.10" class="mw-redirect" title="OS X 10.10">OS X 10.10</a>, the entire pinwheel rotates (previously only the overlaying translucent layer moved). With <a href="/wiki/OS_X_10.11" class="mw-redirect" title="OS X 10.11">OS X 10.11 El Capitan</a> the spinning wait-cursor's design was updated. It now has less shadowing and has brighter, more solid colors to better match the design of the user interface and the colors also turn with the spinning, not just the texture. </p> <div class="mw-heading mw-heading2"><h2 id="System_usage">System usage</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=3" title="Edit section: System usage"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>In single-task operating systems like the original <a href="/wiki/Macintosh_128K" title="Macintosh 128K">Macintosh</a> <a href="/wiki/Operating_system" title="Operating system">operating system</a>, the wait cursor might indicate that the computer was completely unresponsive to user input, or just indicate that response may temporarily be slower than usual due to disk access. This changed with multitasking operating systems such as <a href="/wiki/Classic_Mac_OS#System_Software_5" title="Classic Mac OS">System Software 5</a>, where it is possible to switch to another application and continue to work there. Individual applications could also choose to display the wait cursor during long operations (and were often able to cancel this display with a keyboard command). </p><p>After the transition to Mac OS X (<a href="/wiki/MacOS" title="MacOS">macOS</a>), the display of the wait cursor was only able to be controlled by the operating system, not by the <a href="/wiki/Application_software" title="Application software">application</a>. This could indicate that the application was in an <a href="/wiki/Infinite_loop" title="Infinite loop">infinite loop</a>, or just performing a lengthy operation and ignoring events. Each application has an <a href="/wiki/Message_queue" title="Message queue">event queue</a> that receives events from the operating system (for example, key presses and mouse button clicks); and if an application takes longer than 2 seconds<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> to process the events in its event queue (regardless of the cause), the operating system displays the wait cursor whenever the cursor hovers over that application's windows. </p><p>The icon is meant to indicate that the application is temporarily unresponsive, a state from which it should recover. It may also indicate that all or part of the application has entered an unrecoverable state or an infinite loop. During this time the user may be prevented from closing, resizing, or even minimizing the windows of the affected application (although moving the window is still possible in OS X, as well as previously hidden parts of the window which are usually redrawn, even when the application is otherwise unresponsive). While one application is unresponsive, typically other applications are usable. A file system and network delays are another common cause. </p> <div class="mw-heading mw-heading2"><h2 id="Guidelines,_tools_and_methods_for_developers"><span id="Guidelines.2C_tools_and_methods_for_developers"></span>Guidelines, tools and methods for developers</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=4" title="Edit section: Guidelines, tools and methods for developers"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>By default, events (and any actions they initiate) are processed sequentially, intended to limit the trivial amount of processing from each event. The spinning wait cursor will appear until the operation is complete. If the operation takes too long, the application will appear unresponsive. Developers may prevent this by using separate <a href="/wiki/Thread_(computing)" title="Thread (computing)">threads</a> for lengthy processing, allowing the application's main thread to continue responding to external events. However, this greatly increases the application's complexity. Another approach is to divide the work into smaller packets and use <a rel="nofollow" class="external text" href="https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSRunLoop_Class/#//apple_ref/occ/instm/NSRunLoop/performSelector:target:argument:order:modes:">NSRunLoop</a> or <a href="/wiki/Grand_Central_Dispatch" title="Grand Central Dispatch">Grand Central Dispatch</a>. </p> <ul><li><a href="/wiki/Computer_bugs" class="mw-redirect" title="Computer bugs">Bugs</a> in applications can cause them to stop responding to events; for instance, an <a href="/wiki/Infinite_loop" title="Infinite loop">infinite loop</a> or a deadlock. Applications afflicted rarely recover.</li> <li>Problems with the <a href="/wiki/Virtual_memory" title="Virtual memory">virtual memory</a> system—such as slow <a href="/wiki/Paging" class="mw-redirect" title="Paging">paging</a> caused by a spun-down <a href="/wiki/Hard_disk" class="mw-redirect" title="Hard disk">hard disk</a> or disk read-errors—will cause the wait cursor to appear across multiple applications, until the hard disk and virtual memory system recover.</li></ul> <p><a href="/wiki/Apple_Developer_Tools#Instruments" title="Apple Developer Tools">Instruments</a> is an application that comes with the Mac OS X Developer Tools. Along with its other functions, it allows the user to monitor and sample applications that are either not responding or performing a lengthy operation. Each time an application does not respond and the spinning wait cursor is activated, Instruments can sample the process to determine which code is causing the application to stop responding. With this information, the developer can rewrite code to avoid the cursor being activated. </p><p>Apple's guidelines suggest that developers try to avoid invoking the spinning wait cursor, and instead suggest using other <a href="/wiki/User_interface" title="User interface">user interface</a> indicators, such as an asynchronous <a href="/wiki/Progress_indicator" title="Progress indicator">progress indicator</a>. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=5" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Windows_wait_cursor" title="Windows wait cursor">Windows wait cursor</a></li> <li><a href="/wiki/Spinning_cursor" class="mw-redirect" title="Spinning cursor">Spinning cursor</a></li> <li><a href="/wiki/Spinning_wheel_(throbber)" class="mw-redirect" title="Spinning wheel (throbber)">Spinning wheel (throbber)</a></li> <li><a href="/wiki/Pointer_(user_interface)" class="mw-redirect" title="Pointer (user interface)">Pointer (user interface)</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=6" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-8">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.thegogglesdonothing.com/archives/2010/03/next_optical_discs.shtml">NeXT Optical Discs</a>, <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/peterl/4412309785/in/photolist-7HUeYD-48246d-9B3cMx-8UHiBT-4yKV9B-asA5jU-DonUQ-9mMqHx-5WoGvo-jBdptu-4GXcBN-aa6dWV-oUU5hm-mpSDSk-atpDYL-oTqKnK-pjABF-x4shkA-9U3nnH-ehmWuS-5GXYNw-ixiHFH-at2xdH-pwYCYF-rxpLxy-8VYstt-B7DiU-6ujLjB-9635ah-rL4X8-qPNv8X-khREKc-oT5eQQ-pxfbUq-4y24in-rjgcCa-6iVcuF-uX6bGr-qTaLrx-ru2Mn3-qPLo3Z-5WoGsd-fa3Bty-oT5eKQ-62QGVY-9ftpkH-4vMh8G-9RTeA4-rLu5Bs-qPzxoL/">Photo of the underside, showing the rainbow effect depicted on the icon</a> (a then new type of media that was built into the early <a href="/wiki/NeXT_Computer" title="NeXT Computer">NeXT Cubes</a>.)</span> </li> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text">often an external <a href="/wiki/AppleCD" title="AppleCD">AppleCD</a> drive was used</span> </li> <li id="cite_note-11"><span class="mw-cite-backlink"><b><a href="#cite_ref-11">^</a></b></span> <span class="reference-text">not a single bit was changed</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-cnet_2005-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-cnet_2005_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation news cs1"><a rel="nofollow" class="external text" href="http://reviews.cnet.com/8301-13727_7-10334440-263.html?tag=mfiredir">"Mini-Tutorial: The dreaded spinning pinwheel; Avoiding unresponsiveness/slow-downs in Mac OS X"</a>. <i><a href="/wiki/CNet" class="mw-redirect" title="CNet">CNet</a></i>. 10 March 2005<span class="reference-accessdate">. Retrieved <span class="nowrap">16 July</span> 2012</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=CNet&rft.atitle=Mini-Tutorial%3A+The+dreaded+spinning+pinwheel%3B+Avoiding+unresponsiveness%2Fslow-downs+in+Mac+OS+X&rft.date=2005-03-10&rft_id=http%3A%2F%2Freviews.cnet.com%2F8301-13727_7-10334440-263.html%3Ftag%3Dmfiredir&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developer.apple.com/library/content/documentation//UserExperience/Conceptual/OSXHIGuidelines/Pointers.html#//apple_ref/doc/uid/20000957-CH97-SW2">"macOS Human Interface Guidelines: Pointers"</a>. <i>developer.apple.com</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20220621131854/https://developer.apple.com/design/human-interface-guidelines/platforms/designing-for-macos/#//apple_ref/doc/uid/20000957-CH97-SW2">Archived</a> from the original on 2022-06-21<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-01-24</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=developer.apple.com&rft.atitle=macOS+Human+Interface+Guidelines%3A+Pointers&rft_id=https%3A%2F%2Fdeveloper.apple.com%2Flibrary%2Fcontent%2Fdocumentation%2F%2FUserExperience%2FConceptual%2FOSXHIGuidelines%2FPointers.html%23%2F%2Fapple_ref%2Fdoc%2Fuid%2F20000957-CH97-SW2&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.macworld.com/article/1151583/spinningbeachballofdeath.html">"Troubleshoot the spinning beach ball"</a>. <i>Macworld</i>. 2010-05-28. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200322050141/https://www.macworld.com/article/1151583/spinningbeachballofdeath.html">Archived</a> from the original on 2020-03-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-03-22</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Macworld&rft.atitle=Troubleshoot+the+spinning+beach+ball&rft.date=2010-05-28&rft_id=https%3A%2F%2Fwww.macworld.com%2Farticle%2F1151583%2Fspinningbeachballofdeath.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://macpaw.com/how-to/the-spinning-wheel-on-mac">"How to Fix a Spinning Wheel of Death on Mac"</a>. <i>MacPaw</i>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200322050142/https://macpaw.com/how-to/the-spinning-wheel-on-mac">Archived</a> from the original on 2020-03-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-03-22</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=MacPaw&rft.atitle=How+to+Fix+a+Spinning+Wheel+of+Death+on+Mac&rft_id=https%3A%2F%2Fmacpaw.com%2Fhow-to%2Fthe-spinning-wheel-on-mac&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.macobserver.com/tmo/article/frozen-how-to-force-quit-an-os-x-app-showing-a-spinning-beachball-of-death">"Frozen: How to Force Quit an OS X App Showing a Spinning Beachball of Death – The Mac Observer"</a>. <i>www.macobserver.com</i>. 2 September 2015. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20200322050142/https://www.macobserver.com/tmo/article/frozen-how-to-force-quit-an-os-x-app-showing-a-spinning-beachball-of-death">Archived</a> from the original on 2020-03-22<span class="reference-accessdate">. Retrieved <span class="nowrap">2020-03-22</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=www.macobserver.com&rft.atitle=Frozen%3A+How+to+Force+Quit+an+OS+X+App+Showing+a+Spinning+Beachball+of+Death+%E2%80%93+The+Mac+Observer&rft.date=2015-09-02&rft_id=https%3A%2F%2Fwww.macobserver.com%2Ftmo%2Farticle%2Ffrozen-how-to-force-quit-an-os-x-app-showing-a-spinning-beachball-of-death&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developer.apple.com/DOCUMENTATION/mac/QuickDraw/QuickDraw-371.html">"Using the Cursor Utilities (IM: Im)"</a>. Developer.apple.com<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-04-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Using+the+Cursor+Utilities+%28IM%3A+Im%29&rft.pub=Developer.apple.com&rft_id=https%3A%2F%2Fdeveloper.apple.com%2FDOCUMENTATION%2Fmac%2FQuickDraw%2FQuickDraw-371.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-7">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://developer.apple.com/documentation/macos8/HumanInterfaceToolbox/AppManager/ProgWithAppearanceMgr/Appearance.3e.html">"SetAnimatedThemeCursor"</a>. Developer.apple.com<span class="reference-accessdate">. Retrieved <span class="nowrap">2010-04-30</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=SetAnimatedThemeCursor&rft.pub=Developer.apple.com&rft_id=https%3A%2F%2Fdeveloper.apple.com%2Fdocumentation%2Fmacos8%2FHumanInterfaceToolbox%2FAppManager%2FProgWithAppearanceMgr%2FAppearance.3e.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.macworld.com/article/1002489/firstaid.html">"Macworld 2002-04-01"</a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151003090240/http://www.macworld.com/article/1002489/firstaid.html">Archived</a> from the original on 2015-10-03<span class="reference-accessdate">. Retrieved <span class="nowrap">2015-10-02</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Macworld+2002-04-01&rft_id=http%3A%2F%2Fwww.macworld.com%2Farticle%2F1002489%2Ffirstaid.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> <li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://arstechnica.com/apple/2002/09/macosx-10-2/9/">Ars Technica Jaguar review: "The dreading "spinning rainbow disc" has an all new look in Jaguar"</a></span> </li> <li id="cite_note-13"><span class="mw-cite-backlink"><b><a href="#cite_ref-13">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20230905001130/https://docs.huihoo.com/apple/wwdc/2012/session_709__whats_new_in_the_filesystem.pdf">"WWDC 2012 – Session 709 – What's New in the File System"</a> <span class="cs1-format">(PDF)</span>. <i>Apple</i>. Archived from <a rel="nofollow" class="external text" href="https://developer.apple.com/devcenter/download.action?path=/wwdc_2012/wwdc_2012_session_pdfs/session_709__whats_new_in_the_filesystem.pdf">the original</a> <span class="cs1-format">(PDF)</span> on 2023-09-05<span class="reference-accessdate">. Retrieved <span class="nowrap">2018-05-23</span></span>. <q>Applications SPOD if they don't service the event loop for two seconds</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Apple&rft.atitle=WWDC+2012+%E2%80%93+Session+709+%E2%80%93+What%27s+New+in+the+File+System&rft_id=https%3A%2F%2Fdeveloper.apple.com%2Fdevcenter%2Fdownload.action%3Fpath%3D%2Fwwdc_2012%2Fwwdc_2012_session_pdfs%2Fsession_709__whats_new_in_the_filesystem.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ASpinning+pinwheel" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spinning_pinwheel&action=edit&section=8" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://support.apple.com/en-my/guide/mac-help/mh35695/mac">Pointers in macOS</a> from Apple's website.</li> <li><a rel="nofollow" class="external text" href="http://www.thexlab.com/faqs/sbbod.html">Troubleshooting the "Spinning Beach Ball of Death"</a> Excerpt from “Troubleshooting Mac OS X” book where there are some information on how to deal with Spinning Wait Cursor problems.</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol 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codes</a></li> <li><a href="/wiki/List_of_SMTP_server_return_codes" title="List of SMTP server return codes">List of SMTP server return codes</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink selflink">Spinning pinwheel</a></li> <li><a href="/wiki/Windows_wait_cursor" title="Windows wait cursor">Windows wait cursor</a></li> <li><a href="/wiki/2024_CrowdStrike_incident" class="mw-redirect" title="2024 CrowdStrike incident">2024 CrowdStrike incident</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" 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