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Erased Macos sierra by mistake. Now I just have a question mark showing. How do I get my operating system back?

Accidentally erased the operating system. Now I just have a question mark showing. How do I restore?

MacBook Air 11″, macOS 10.12

Posted on Sep 22, 2023 09:02 PM

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Posted on Sep 22, 2023 09:18 PM

Restart with the Command and R keys held down and install a fresh OS.

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Sep 22, 2023 09:18 PM in response to MaryLEH

Restart with the Command and R keys held down and install a fresh OS.

(248866)

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Erased Macos sierra by mistake. Now I just have a question mark showing. How do I get my operating system back?

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