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B5summit Author

Level 1

5 points

macOS Catalina

When I try to update to mac OS Catalina on my iMac (21.5-inch, Late 2013) I keep getting the "Unknown Error" message. I know that's a vague description, but Any suggestions?

iMac 21.5", OS X 10.10

Posted on Apr 6, 2020 9:06 AM

Top-ranking reply

rkaufmann87

Level 10

143,392 points

Posted on Apr 6, 2020 9:08 AM

By chance is there any antivirus, cleaning or any other types of third party maintenance apps installed on the computer?

Also, have you tried booting into Safe Mode per the directions in Safe Mode Reset instructions

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macOS Catalina

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