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.

My 2012 Mac Pro will not restart at all after installing the macOS 10.14.6 Supplemental Update.

My 2012 Mac Pro will not restart at all after installing the macOS 10.14.6 Supplemental Update. It won’t even boot in recovery mode. Can someone please help with a fix?!

Mac Pro, macOS 10.14

Posted on Oct 9, 2020 3:16 PM

Reply
Question marked as Top-ranking reply

Posted on Oct 9, 2020 3:27 PM

Could be serious hardware problem, but...


Have you done a PRAM reset, CMD+Option+p+r...


http://support.apple.com/kb/HT1379


In fact, do 3 in a row, takes a bit of time.


Intel-based Macs: Resetting the System Management Controller (SMC)...


http://support.apple.com/kb/HT3964

3 replies

My 2012 Mac Pro will not restart at all after installing the macOS 10.14.6 Supplemental Update.

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