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unmount Macintosh HD

I am erasing the hard drive on iMac (2020, Catalina). Message is "the volume Macintosh HD couldn't be unmounted because it is in use by (kextcache).

Tried repairing, message "couldn't unmount disk (- 69565)

iMac Pro

Posted on Apr 9, 2020 10:17 AM

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Question marked as Top-ranking reply

Posted on Apr 9, 2020 10:22 AM

If you intend to completely erase your Mac's startup disk, please read How to erase a disk for Mac - Apple Support.

5 replies

unmount Macintosh HD

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