Is there a way to disable Growl notifications automatically when a certain app is running, Quick Time for example. I don't want to get the notifications while watching a movie.
MacOS – Disable Growl Notification When a Certain App is Running
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Best Answer
Full credit to @ghoppe over at Super User for this excellent answer. I'm only duplicating it here because a moderator on Meta suggested that it would be appropriate to do so.
Please note that this solution will suppress Growl when VLC (media player) is running. To make it work for another application (e.g. QuickTime), you'll have to modify the Applescript. If you've tried yourself but still need help, I would suggest posting a question about it over at Stack Overflow.
Original answer follows: