Question mark appears on the screen

On my iMac screen question mark is appears

iMac, OS X 10.11

Posted on Feb 22, 2021 3:17 AM

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Question marked as Top-ranking reply

Posted on Feb 22, 2021 4:01 AM

Did you read this page? It explains what it means and what you need to do.

If your Mac starts up to a question mark - Apple Support

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Question mark appears on the screen

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