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Updated MacBook Pro to Catalina, now it won't startup (black screen)

I updated my MacBook Pro to Catalina, and I have not been able to get it to boot up since. I can hear it trying to start, but the screen remains black. Any ideas on how to fix this?

MacBook Pro 15″, macOS 10.15

Posted on Jun 26, 2020 12:18 PM

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Question marked as Top-ranking reply

Posted on Jun 26, 2020 12:33 PM

When you hear the startup sound, immediately hold down Command-Alt-P-R; your Mac should re-boot. Keep holding them down until you hear four restarts (or two minutes ... whichever happens first.)



Does that help?

1 reply

Updated MacBook Pro to Catalina, now it won't startup (black screen)

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