iMac running Catalina having shutdown problems and constantly restarts

Fiona-123 wrote:

I see some old posts relating to this which sound similar issue but can't see any solutions. Does anyone have advice? Hangs on shutdown, often seems that it is ok but next morning I find it has restarted and asks to send an error message to Apple which I have done on multiple occasions. Can't see what the problem is. Check everything has shut down - only thing running in background is a WD HD which time machine uses for back ups.

Starting to really annoy me

If your Mac restarted because of a problem - Apple Support

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