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Level 1

6 points

what does apple.com/support -21 00F message mean

Cant restart my iMac after it upgraded new update.

Tried to do a reset pressing the (option - command - R) keys and a globe with an exclamation icon comes up.

It says apple.com/support -21 00F

What does this mean?

Posted on Nov 13, 2017 4:43 AM

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what does apple.com/support -21 00F message mean

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