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black screen and white bar

won't complete a boot up....white bar almost reaches end but stops short


iMac 27″ 5K, macOS 10.14

Posted on Feb 9, 2021 2:45 PM

Reply
Question marked as Apple recommended

Hi there,


Read this: https://support.apple.com/en-us/HT207019


You may also need to reset:

PRAM: https://support.apple.com/en-us/HT204063

SMC: https://support.apple.com/en-us/HT201295


Cheers,


Jack

Posted on Feb 9, 2021 2:49 PM

1 reply

black screen and white bar

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