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Home/ Questions/Q 6603741
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Editorial Team
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Editorial Team
Asked: May 25, 20262026-05-25T19:03:21+00:00 2026-05-25T19:03:21+00:00

Is there any way to call App Expose in Lion programmatically, for example on

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Is there any way to call App Expose in Lion programmatically, for example on an event tap, etc?

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  1. Editorial Team
    Editorial Team
    2026-05-25T19:03:22+00:00Added an answer on May 25, 2026 at 7:03 pm

    If you don’t mind using a TOTALLY UNDOCUMENTED API, which might change at any point without notice:

    void CoreDockSendNotification(CFStringRef, void *);
    (...)
    CoreDockSendNotification(@"com.apple.expose.front.awake", NULL);
    

    Other known arguments are @"com.apple.expose.awake" and @"com.apple.dashboard.awake", which activate Mission Control and Dashboard, respectively. @"com.apple.showdesktop.awake" used to activate Show Desktop, but no longer works on current versions of macOS.

    Note that most applications should not use these calls — these actions are intended to be invoked directly by the user.

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