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osx base system locked

  1. M

    Disk0 error on SSD

    I tried installing an old os, that appeared to be to old for the SSD I am using. It now only starts to a prohibit symbol. When I try to fix the problem I can not see my disk in the disk utility. I only have disk0 and OS X basesystem. please help me out, this is driving me crazy… thanks in...
  2. iosmike

    OS X Base System Locked

    Background of my question: 1. I have a macmini 2012. I ran Command + R and clicked Disk Utility. I picked "Macintosh HD" , clicked "First Aid", nothing showed to fix. Then I clicked "Unmount" by mistake; 2. Now only OS X Base System shows in Disk Utility (as attached photo); 3. Now I...
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