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observeValueForKeyPath:... called too often in macOS 12
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observeValueForKeyPath:... called too often in macOS 12


  • Subject: observeValueForKeyPath:... called too often in macOS 12
  • From: "Gerriet M. Denkmann" <email@hidden>
  • Date: Sat, 15 Oct 2016 13:08:43 +0700

My app (macOS 12) observes a value in NSUserDefaults.

Starting with macOS 12 observeValueForKeyPath:… is called at the start of the program, although nothing has changed yet.
When the value actually changes, it is called twice.

Also: NSKeyValueObservingOptionNew or NSKeyValueObservingOptionOld just return NSNull instead of old or new values.

Any workaround for these multiple (and unnecessary) calls?

Gerriet.


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