Fixing Quicklook Without Rebooting

Unfortunately, since the last OS update for the Mac (Monterey), QuickLook has become especially unstable, especially on my M1 Mac Mini. It doesn’t cause crashes or anything, it simply stops working; especially with video files. However there is a simple solution to the problem. From the Terminal, just run the command (you do not need sudo):

killall -HUP QuickLookUIService

This will restart just the QuickLook service, and it should start working for you again. Until it doesn’t.

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