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salty117 Author

Level 1

4 points

My Mac book won’t start after update. I get a flashing” ? “ With support requested

MacBook Pro 13″, OS X 10.10

Posted on Dec 27, 2021 7:13 PM

Top-ranking reply

MsPamelaM2

Level 2

355 points

Posted on Dec 27, 2021 7:18 PM

Start here:

https://support.apple.com/en-us/HT204323

Follow each individual link (eg NVRAM) within the document. I've had NVRam issues in the past re non silicon chip devices, so hopefully yours is as simple.

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My Mac book won’t start after update. I get a flashing” ? “ With support requested

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