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The only way I can get the computer to shut down is to first restart the computer and then go through the shutdown procedure. I've run disk first aid and reinstalled Catalina. But after a couple of days, the same issue reappears. Apple is telling me this may be a hardware issue, but I'm not convinced of this yet. Any thoughts?
iMac 27", macOS 10.15
Reset the SMC, as per > How to reset the System Management Controller (SMC) on your Mac - Apple Support
Followed by a NVRAM reset, as per > Reset NVRAM or PRAM on your Mac - Apple Support
Now if it is still not working correctly, > Use safe mode to isolate issues with your Mac - Apple Support
Next go to: Apple > System Preferences > Energy Saver and try unchecking the boxes including Power Nap.
If none of the above solve your problem, then it is very likely that you need to reinstall macOS
as per > How to reinstall macOS from macOS Recovery - Apple Support
Reset the SMC, as per > How to reset the System Management Controller (SMC) on your Mac - Apple Support
Followed by a NVRAM reset, as per > Reset NVRAM or PRAM on your Mac - Apple Support
Now if it is still not working correctly, > Use safe mode to isolate issues with your Mac - Apple Support
Next go to: Apple > System Preferences > Energy Saver and try unchecking the boxes including Power Nap.
If none of the above solve your problem, then it is very likely that you need to reinstall macOS
as per > How to reinstall macOS from macOS Recovery - Apple Support
IMAC Won't Shutdown
