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stuck on restart

2019 iMac 21.5 inch running OS Catalina 10.15.7. when I click on restart in apple menu the screen go blank and nothing else happens, the Mac won't restart. I press the on/off button at the rear and iMac restarts. Also on occasions I get the spinning rainbow wheel, why is this happening? Do I need to reinstall Catalina?


iMac 21.5″, macOS 10.15

Posted on Dec 27, 2020 3:53 AM

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Question marked as Top-ranking reply

Posted on Dec 27, 2020 8:04 AM

IF Malwarebytes is the only third party AV, cleaning or other maintenance app installed you may have installed some malware or the computer may have a hardware issue.


If you any wired peripherals attached, please disconnect them as one may be causing your problem.


Also please do the following:

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Question marked as Top-ranking reply

Dec 27, 2020 8:04 AM in response to Roger24

IF Malwarebytes is the only third party AV, cleaning or other maintenance app installed you may have installed some malware or the computer may have a hardware issue.


If you any wired peripherals attached, please disconnect them as one may be causing your problem.


Also please do the following:

stuck on restart

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