2011 MacBook Air - Installed 10.8, Can't Go Back To 10.7

Discussion in 'MacBook Air' started by kolax, Dec 13, 2012.

  1. kolax macrumors G3

    Mar 20, 2007
    I upgraded a 2011 MacBook Air to Mountain Lion, however, it isn't playing nice with some enterprise things, so I want to put Lion back on it again.

    Booting the Air with a USB stick containing the Lion installer doesn't work (see photo below). I booted it off a USB stick containing the Mountain Lion installer instead, and loaded Disk Utility to wipe the hard drive, because I thought it would refuse to boot the USB stick containing 10.7 if it saw 10.8 was installed.

    Anyway, that didn't help, because I still can't it to boot from my Lion USB installer.

    When I hold alt and select the Lion installer, I get this screen for about 10 secs before the machine shuts down. I've re-made the Lion USB stick, and I'm using the same USB stick that I used to make the Mountain Lion installer.

    Any ideas?

    Attached Files:

  2. justperry macrumors G3


    Aug 10, 2007
    In the core of a black hole.
    Might be a permissions problem, or the OS is not blessed.

    Can't you do an internet recovery, don't know if you can choose 10.7 though.
  3. kolax thread starter macrumors G3

    Mar 20, 2007
    Found out it is because the Lion image I have is older than the MacBook Air, so doesn't have the boot drivers needed.

    I'm re-downloading Lion from the App Store.

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