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copied!<p>As I posted in <a href="https://stackoverflow.com/questions/6103962/perform-certain-system-events-mac-os-x/6105338#6105338">this answer</a>, I've been using the following code for over 8 years without issues:</p> <p>MDRestartShutdownLogout.h:</p> <pre><code>#import <CoreServices/CoreServices.h> /* * kAERestart will cause system to restart * kAEShutDown will cause system to shutdown * kAEReallyLogout will cause system to logout * kAESleep will cause system to sleep */ extern OSStatus MDSendAppleEventToSystemProcess(AEEventID eventToSend); </code></pre> <p>MDRestartShutdownLogout.m:</p> <pre><code>#import "MDRestartShutdownLogout.h" OSStatus MDSendAppleEventToSystemProcess(AEEventID eventToSendID) { AEAddressDesc targetDesc; static const ProcessSerialNumber kPSNOfSystemProcess = {0, kSystemProcess }; AppleEvent eventReply = {typeNull, NULL}; AppleEvent eventToSend = {typeNull, NULL}; OSStatus status = AECreateDesc(typeProcessSerialNumber, &kPSNOfSystemProcess, sizeof(kPSNOfSystemProcess), &targetDesc); if (status != noErr) return status; status = AECreateAppleEvent(kCoreEventClass, eventToSendID, &targetDesc, kAutoGenerateReturnID, kAnyTransactionID, &eventToSend); AEDisposeDesc(&targetDesc); if (status != noErr) return status; status = AESendMessage(&eventToSend, &eventReply, kAENormalPriority, kAEDefaultTimeout); AEDisposeDesc(&eventToSend); if (status != noErr) return status; AEDisposeDesc(&eventReply); return status; } </code></pre> <p>Note that the above code is based on the code from <a href="http://developer.apple.com/library/mac/#qa/qa1134/_index.html" rel="nofollow noreferrer">Technical Q&A QA1134</a>, but mine is re-worked to use <code>AESendMessage()</code> rather than <code>AESend()</code>. <code>AESend()</code> is in <code>HIToolbox.framework</code>, which is in <code>Carbon.framework</code> and is therefore unavailable to 64-bit apps. (<code>AESendMessage()</code> is part of the <code>AE.framework</code> in <code>CoreServices</code>).</p>

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