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.

Mac won't boot up

my Mac won't boot up after installing the latest OS update

iMac 27″, macOS 10.15

Posted on Jul 30, 2021 11:29 AM

Reply
Question marked as Top-ranking reply

Posted on Jul 30, 2021 11:34 AM

Hello, val47.


Can you get the Mac to boot in Safe mode? (hold the shift key down at startup). It can take much longer (10 min) to safe boot so be patient.

How to use safe mode on your Mac - Apple Support 


Safe mode forces the OS to clear certain caches and logs and do other miscellaneous housekeeping. It's non-destructive to user data so is safe to do.  Very often certain weird software behavior is corrected by simply logging in this way as a troubleshooting method. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's normal.


Exit safe mode by restarting your Mac normally and re-evaluate the issue again.

1 reply
Question marked as Top-ranking reply

Jul 30, 2021 11:34 AM in response to val47

Hello, val47.


Can you get the Mac to boot in Safe mode? (hold the shift key down at startup). It can take much longer (10 min) to safe boot so be patient.

How to use safe mode on your Mac - Apple Support 


Safe mode forces the OS to clear certain caches and logs and do other miscellaneous housekeeping. It's non-destructive to user data so is safe to do.  Very often certain weird software behavior is corrected by simply logging in this way as a troubleshooting method. When you're in safe boot, the machine will not be at its best performance, especially with graphics, but that's normal.


Exit safe mode by restarting your Mac normally and re-evaluate the issue again.

Mac won't boot up

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