Why can't I select my disk to erase in order to reset my macbook?

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I am resetting my macbook pro 15 2018, and followed the steps on Apples article.

Once I get to the final step of going to utilities>Disk Utility>choose your machintosh HD > select erase...

I am not able to click on the erase button. My screenshot shows below:

MacBook Pro 15″, macOS 11.3

Posted on May 3, 2021 7:20 PM

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Answer 1

Level 3

806 points

Are you trying to erase Macintosh HD from within a running system?

You can only do that from the recovery environment, not the running system.

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