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lonb1947 Author

Level 1

5 points

erase and reinstalling mac os high sierra. Disk locked using disk utility and can't reinstall os high sierra

while erasing and reinstalling the mac os high sierra on my imac, I can't reinstall the os because it shows that the disk is locked. It won't allow me to choose the drive to reinstall

iMac 21.5″, macOS 10.13

Posted on Sep 3, 2021 8:25 PM

Best reply

PRP_53

Level 10

85,093 points

Posted on Sep 4, 2021 2:06 AM

Was this method used to erase the HD as per Apple method >> How to erase an Intel-based Mac

Was this method used to Reinstall the OS as per Apple >> How to reinstall macOS

Follow these guidelines during installation:

If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
If the installer offers you the choice between installing on Macintosh HD or Macintosh HD - Data, choose Macintosh HD.
Allow installation to complete without putting your Mac to sleep or closing its lid. Your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.

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erase and reinstalling mac os high sierra. Disk locked using disk utility and can't reinstall os high sierra

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