Disk Utility won't allow "erase" on my HD

Discussion in 'MacBook Pro' started by Loonytik, Mar 9, 2011.

  1. Loonytik macrumors 6502a

    Loonytik

    Joined:
    Jun 2, 2008
    #1
    I'm selling my Macbook Air and want to erase the hard drive completely and reinstall the OS. When I go to the disk utility and select the Macintosh HD the only option I am given is "Erase Free Space". The security options and "erase" are greyed out.

    What's going on here? How can I erase the full volume?

    Thanks!
     
  2. Ccrew macrumors 68020

    Joined:
    Feb 28, 2011
    #2
    Won't allow you unless you're booting from install media.. ie: DVD. Otherwise you're trying to delete the disc the utility is running from.
     
  3. Loonytik thread starter macrumors 6502a

    Loonytik

    Joined:
    Jun 2, 2008
    #3
    I'm using a Macbook Air late 2010 with the software install drive. The only options are to reinstall OSX or run a hardware test. How can I get it to boot from there so I can erase the original OS?
     
  4. Ccrew macrumors 68020

    Joined:
    Feb 28, 2011
    #4
    I don't have an air, but in a regular install when it gets to the first screen after the language screen on a re-install it enables the menu, and under Utilities is Disc Utility. You run from there.
     
  5. Loonytik thread starter macrumors 6502a

    Loonytik

    Joined:
    Jun 2, 2008
    #5
    Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

    Perfect. Thanks
     

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