For my late 2012 iMac I clicked restore on Disk Utility and it restored it to “OS X BASE SYSTEM”.

I tried to reinstall macOS but it said the disk was locked. When I boot up my iMac it only boots in to recovery mode not macOS.

(I don’t really care if I lost all my data on it.)

closed as unclear what you're asking by nohillside Jan 4 '18 at 7:56

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    This is all somewhat confused. You cannot install to the base system; that's just the recovery system held in RAM. You need to install to your actual drive. – Tetsujin Dec 15 '17 at 13:59

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