Cannot mount InstallESD.dmg of ML on a Leopard MBA!

Discussion in 'OS X Mountain Lion (10.8)' started by Crisis, Aug 9, 2012.

  1. macrumors member

    Joined:
    Jul 19, 2012
    #1
    I bought a new rMBP last month and received a redeem code for Mountain Lion. Now I am trying to upgrade my Late-2009 MBA, which is still running a Leopard system. However, I copied the InstallESD.dmg from the installation package to this Leopard machine and it cannot be mounted, not to say restoring it to a flash disk.

    Is it because the system is to obsolete that cannot read newly released dmg files? This mba is in my another house and I didn't bring my new rMBP here. so the InstallESD.dmg and a Leopard machine is all I have here, please please give me some advice!
     
  2. macrumors 65816

    Joined:
    Jan 9, 2007
    #2
    Have you tried copying the entire "Install Mountain Lion" app to the SL machine?
     
  3. macrumors 6502a

    Joined:
    Feb 26, 2011
    Location:
    Las Vegas, NV
    #3
    You can't upgrade a Mac with Leopard to Mountain Lion.
     
  4. thread starter macrumors member

    Joined:
    Jul 19, 2012
    #4
    No, clearly it cannot run on a Leopard so I copied the InstallESD.dmg inside it.

    ----------

    I know, I guess Apple means the Install Mountain Lion app runs only on SL and Lion. That for upgrading, but what I am trying to do here is creating a bootable installation disk and wipe my HD drive and make a clean install.
     
  5. macrumors 6502

    Joined:
    Sep 15, 2008
    #5
    Try restoring it to a flash drive through Disk Utility without mounting it first
     

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