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Home/ Questions/Q 8363175
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Editorial Team
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Editorial Team
Asked: June 9, 20262026-06-09T12:06:53+00:00 2026-06-09T12:06:53+00:00

I’d like to do some things in my mac app when a user starts

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I’d like to do some things in my mac app when a user starts using another app or the Finder and my app isn’t in focus anymore.

How do I do that?

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  1. Editorial Team
    Editorial Team
    2026-06-09T12:06:55+00:00Added an answer on June 9, 2026 at 12:06 pm

    You can observe the NSApplicationDidResignActiveNotification to find out when you aren’t the active application anymore. This and related notifications are documented in the NSApplication Class Reference.

    If you don’t know how to observe notifications, you will want to read Notification Programming Topics.

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