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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

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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.

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