Hi all,
I want to erase my iMac’s HD and reinstall Sierra before selling it.
I’ve rebooted, used CMD-R and got to the macOS Utilities menu where I have
tried to erase the disk but it won’t.
I’ve selected WDC WD5000AAKS-402AA0 Media.
First Aid says it’s all fine.
When I run Erase it shows:
Unmounting disk
Couldn’t unmount disk.
Operation failed…
I’ve tried to use diskutil in Terminal with the force option to unmount
/dev/dsk0s2 but it says it can’t unmount it either.
Any ideas?
Cheers,
Stephen
"More than any other time in history, mankind faces a crossroads. One path
leads to despair and utter hopelessness. The other, to total extinction. Let us
pray we have the wisdom to choose correctly." - Woody Allen
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