screen not responding
Why doesn't my mac desktop screen respond when I click on the red button to close the screen or when I click on a image and/or a text to open it?
iMac 21.5″, macOS 10.15
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Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes or more.
Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.