PLEASE HELP

MacBook Air1111

macrumors newbie
Original poster
Aug 7, 2017
1
0
I tried to factory’s reset by erasing all data in “Macintosh HD” then I tried to reinstall Mac OS but OS X Base System is a locked disk. And the only disks in my disk utility are APPLE SSD a few numbers and letters then Media and OS X base system! I don’t know what to do
 

posguy99

macrumors 65816
Nov 3, 2004
1,130
643
I tried to factory’s reset by erasing all data in “Macintosh HD” then I tried to reinstall Mac OS but OS X Base System is a locked disk. And the only disks in my disk utility are APPLE SSD a few numbers and letters then Media and OS X base system! I don’t know what to do
It should be a locked disk. You don't want to install over the installer image, you want to install on the SSD.

If you didn't know what you were doing, you shouldn't have started.
 
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filmbuff

macrumors 6502a
Jan 5, 2011
864
211
I had this problem recently and had to try several times to wipe and reformat the disk using disk utility, and finally was able to use internet recovery to download and install a new copy of Mountain Lion (the original OS) and then upgrade back to Sierra. What a pain. Plan C was to boot from a Ubuntu flash drive and use the Ubuntu disk utility to unmount and erase Macintosh SSD. The whole problem happened because I tried to restore my computer without disabling Filevault first. It should have worked fine since I had the disk password but something went awry.
 

meeebee

macrumors member
Jan 23, 2016
75
28
Try the Cmd+R first. If that doesn't work then create a USB installer if you can get access to another Mac (link is for El Capitan - do a search if you are looking for another version).
 
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