You can make a difference in the Apple Support Community!

When you sign up with your Apple Account, you can provide valuable feedback to other community members by upvoting helpful replies and User Tips.

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

An error occurred installing macOS

macOS could not be installed in your computer

iMac 21.5″, macOS 10.15

Posted on Jul 22, 2020 5:07 AM

Reply
Question marked as Top-ranking reply

Posted on Jul 22, 2020 2:09 PM

Try installing the standalone update in Safe Mode...


https://support.apple.com/kb/DL2047?locale=en_US


Safe Boot from the HD, (holding Shift key down at startup).

5 replies

An error occurred installing macOS

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.