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when toggle format what by license comment
Oct 23, 2017 at 15:24 comment added DavidRecallsMonica If the prompt appears only as the installer begins the new installation, you might consider reformatting the HD. If you're working from an installer on separate media (not from the recovery partition of the HD), the installer screen that first appears should allow you to select Disk Utility to reformat the drive; this selection may appear on the screen or within one of the Menu Bar menus. Beyond that, or replacing the HD, I'm out of ideas.
Oct 23, 2017 at 8:54 comment added Oliver I have deauthorized it. Guess that's why it doesn't show up under devices? But the system still prompts me for apple id and password when I reinstall os.
Oct 22, 2017 at 15:42 comment added DavidRecallsMonica That's mysterious. If the previous OS is still available on the Macbook, try iTunes > Account > Authorizations > Deauthorize This Computer.
Oct 22, 2017 at 14:47 comment added Oliver Thanks. Strangely, I don't see the Macbook listed under devices.
Oct 21, 2017 at 23:42 history edited Monomeeth CC BY-SA 3.0
Added link to Apple support page.
Oct 21, 2017 at 21:05 history edited grg CC BY-SA 3.0
Markdown list formatting
Oct 21, 2017 at 21:03 history answered DavidRecallsMonica CC BY-SA 3.0