OS X

Mac: How to Find Out Which App Is Blocking a Hotkey

If some hotkey doesn’t work for you, it’s likely that it got blocked by some other app in the background.

To find out which one, open terminal and use:

sudo opensnoop

This command gives you a streaming output of every single open system call.

Then try the hotkey scenario again. The output of the terminal should give you enough clues to find the bogey-app.

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