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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Script Debugger</span></span>
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</style><table class="infobox vevent"><tbody><tr><th colspan="2" class="infobox-above summary">Script Debugger</th></tr><tr><td colspan="2" class="infobox-image logo"><span typeof="mw:File"></span><div class="infobox-caption">Script Debugger icon</div></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Programmer" title="Programmer">Developer(s)</a></th><td class="infobox-data">Late Night Software</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Initial release</th><td class="infobox-data">1995<span style="display:none"> (<span class="bday dtstart published updated">1995</span>)</span></td></tr><tr style="display: none;"><td colspan="2" class="infobox-full-data"></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Software_release_life_cycle" title="Software release life cycle">Final release</a></th><td class="infobox-data"><div style="margin:0px;">8.0.10
/ January 18, 2025<span style="display:none"> (<span class="bday dtstart published updated">2025-01-18</span>)</span></div></td></tr><tr style="display:none"><td colspan="2">
</td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Operating_system" title="Operating system">Operating system</a></th><td class="infobox-data"><a href="MacOS" title="MacOS">macOS</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Computing_platform" title="Computing platform">Platform</a></th><td class="infobox-data"><a href="Mac_(computer)" title="Mac (computer)">Macintosh</a>: <a href="ARM_architecture_family" title="ARM architecture family">ARM</a>, <a href="X86" title="X86">x86</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Software_categories#Categorization_approaches" title="Software categories">Type</a></th><td class="infobox-data"><a href="AppleScript" title="AppleScript">AppleScript</a> <a href="Debugger" title="Debugger">debugger</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;"><a href="Software_license" title="Software license">License</a></th><td class="infobox-data"><a href="Proprietary_software" title="Proprietary software">proprietary</a> <a href="Freeware" title="Freeware">freeware</a></td></tr><tr><th scope="row" class="infobox-label" style="white-space: nowrap;">Website</th><td class="infobox-data"><span class="url"><a rel="nofollow" class="external text" href="http://www.latenightsw.com">www<wbr>.latenightsw<wbr>.com</a></span></td></tr></tbody></table>
<p><b>Script Debugger</b> is a <a href="Mac_(computer)" title="Mac (computer)">Macintosh computer</a> <a href="Source-code_editor" title="Source-code editor">source-code editor</a> and <a href="Debugger" title="Debugger">debugger</a> environment for the <a href="Programming_language" title="Programming language">programming languages</a> <a href="AppleScript" title="AppleScript">AppleScript</a>, and others based on <a href="Apple_Inc." title="Apple Inc.">Apple Inc.</a>'s <a href="Open_Scripting_Architecture" class="mw-redirect" title="Open Scripting Architecture">Open Scripting Architecture</a>. It is a product of Late Night Software.
</p>
<div class="mw-heading mw-heading2"><h2 id="History">History</h2></div>
<p>Script Debugger version 1.0 was released in 1995 by Mark Alldritt as a <a href="Third-party_software_component" title="Third-party software component">third-party</a> alternative to Apple's <a href="Freeware" title="Freeware">freeware</a> application, <a href="AppleScript_Editor" title="AppleScript Editor">Script Editor</a>. Its competitors at that time included ScriptWizard and Main Event Software's popular Scripter. As of 2024, those two products are defunct, leaving only Satimage's <a href="Smile_(software)" title="Smile (software)">Smile</a> and <a href="Integrated_development_environment" title="Integrated development environment">integrated development environments</a> such as <a href="FaceSpan" class="mw-redirect" title="FaceSpan">FaceSpan</a> (also from Late Night) and <a href="AppleScript_Studio" class="mw-redirect" title="AppleScript Studio">AppleScript Studio</a> as Script Debugger's competitors in the field.
</p><p>Version 1 contained several notable features, such as: it was "scriptable" (it could be used to create scripts to control itself), <i>recordable</i> (it could create scripts based on user actions), and <i>attachable</i> (scripts could be written to respond to <a href="Event-driven_programming" title="Event-driven programming">events</a>). More importantly, the program now allowed inspection of running applications to see what events they were emitting. The new utility also contained a full debugger, with support for <a href="Breakpoint" title="Breakpoint">breakpoints</a>.
</p><p>The program has since won many awards in the Macintosh scripting community. Version 1 received "5 mice" from <i><a href="MacUser" title="MacUser">MacUser</a></i> and 4 stars from <i><a href="MacWEEK" title="MacWEEK">MacWEEK</a></i>. Version 2 received the 2000 Macworld Eddy for "Best Development Software", and received "4.5 mice" from both <i>MacUser</i> and <i><a href="Macworld" title="Macworld">Macworld</a></i>.
</p><p>On February 9, 2006, version 4 was released. This version was completely rewritten to take advantage of the new <a href="Cocoa_(software)" class="mw-redirect" title="Cocoa (software)">Cocoa</a> and <a href="Mac_OS_X_v10.4" class="mw-redirect" title="Mac OS X v10.4">Tiger</a> APIs. The new release also included an improved version of the <a href="JavaScript_OSA" title="JavaScript OSA">JavaScript OSA</a> scripting component.
</p><p>Version 5 was released in June 2012.
</p><p>Version 6 was released in June 2016, with support for new features such as <a href="Code_folding" title="Code folding">code folding</a> and AppleScriptObjC.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup>
</p><p>Version 7 was released in March 2018, introducing the free "Lite" mode and new features such as version browsing, enhanced applets, and better bundle editing.<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>
</p><p>Version 8 was released in May 2021, introducing support for macOS Big Sur and Apple Silicon. Other notable features include support for Dark Mode, and for generating standalone script applications that support code signing and notarizing.<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>
</p><p>On January 1, 2025, Mark Aldritt announced the planned retirement of Script Debugger. On May 31, 2025, it was officially retired. As of June 2025, all macOS versions from 4.0 – 8.0.10 are available as <a href="Freeware" title="Freeware">freeware</a> downloads. The Late Night Software website hosts the full software retirement announcement,<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> Mark's goodbye note,<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> and a list of all freely downloadable versions on a downloads page.<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> The Forum web pages will remain available, and user-to-user discussions will be encouraged and supported.
</p><p>Script Debugger has been around for over 30 years and has helped countless AppleScript developers over the years. Thank you Mark Aldritt and everyone else who helped make this software so great over all those years. Many people's lives were made a little bit easier and more productive thanks to all the effort that went in to making this a product that was so fun to use and so productive, and some were made a whole lot easier. Thank You, Thank You, Thank You to Mark and Shane and all the others who made this software so fun and so helpful to so many people over three decades.
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<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>
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</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://latenightsw.com/script-debugger-6-press-release/">"Script Debugger 6 Press Release"</a>. 18 June 2016<span class="reference-accessdate">. Retrieved <span class="nowrap">17 July</span> 2016</span>.</cite></span>
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<li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://latenightsw.com/script-debugger-7-press-release/">"Script Debugger 7 Press Release"</a>. 2 March 2018<span class="reference-accessdate">. Retrieved <span class="nowrap">5 March</span> 2018</span>.</cite></span>
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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://forum.latenightsw.com/t/script-debugger-8-press-release/3086/">"Script Debugger 8 Press Release"</a>. 4 May 2021<span class="reference-accessdate">. Retrieved <span class="nowrap">10 March</span> 2024</span>.</cite></span>
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<li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://forum.latenightsw.com/t/retiring-script-debugger/5071">"Script Debugger Announces It's Retiring"</a>. 1 January 2025<span class="reference-accessdate">. Retrieved <span class="nowrap">3 June</span> 2025</span>.</cite></span>
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<li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://forum.latenightsw.com/t/script-debugger-retired/5182">"Script Debugger Retires"</a>. 31 May 2025<span class="reference-accessdate">. Retrieved <span class="nowrap">3 June</span> 2025</span>.</cite></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"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://latenightsw.com/sd8/download/">"Script Debugger Free Downloads"</a>. 31 May 2025<span class="reference-accessdate">. Retrieved <span class="nowrap">3 June</span> 2025</span>.</cite></span>
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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>
<ul><li><span class="official-website"><span class="url"><a rel="nofollow" class="external text" href="http://www.latenightsw.com">Official website</a></span></span></li>
<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20050615083836/http://tandb.com.au/applescript/editors/">AppleScript Editors</a> a comparison of several editors, out of date</li>
<li><a rel="nofollow" class="external text" href="http://www.applescriptsourcebook.com/links/applescripteditors.html">AppleScript Editors</a>, a page of links to AppleScript utilities</li>
<li><a rel="nofollow" class="external text" href="http://www.pcpro.co.uk/macuser/reviews/16524/script-debugger-301.html">MacUser UK</a> a review of version 3.0.1</li>
<li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20050529001732/http://www.macworld.com/2002/02/reviews/scriptdebugger/">Macworld</a> another review</li></ul>
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