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Erase disk

I am trying to erase the disk on my old mac but it says "this operation cannot be performed because you cannot unmount the volume you are booted from". What do I need to do?


Posted on Jun 7, 2021 7:09 AM

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Question marked as Top-ranking reply

Posted on Jun 7, 2021 7:17 AM

Restart with the Command and R keys held down. If the computer's model or firmware is too old for that to be available, insert a Mac OS X install DVD or thumbdrive and restart with C or Option held down.


(199511)

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Erase disk

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