Problem going from Tiger to Snow Leopard

Discussion in 'macOS' started by pipcherello, Aug 30, 2011.

  1. pipcherello macrumors newbie

    Aug 30, 2011

    I know it's possible to go straight from Tiger to Snow Leopard with the Snow Leopard install disk, so why when I insert the disk and go to install am I getting the message...

    "Mac OSX can't be installed on this computer

    This disc requires that mac OS X 10.5 or later already be installed on this computer."

    Then I have 2 option buttons of system backup or restart.

    Where am I going wrong? I've seen loads of vids on youtube of people doing it, so why is it not working for me?


  2. BrianBaughn macrumors 603


    Feb 13, 2011
    Baltimore, Maryland
    Is the DVD an upgrade disk or full installer? If it's a full installer, is it a retail version or one that shipped with a particular Mac (that won't work at ALL).

    The message sounds like it's the upgrade disk, however.

    If it's an upgrade DVD, t's possible that the upgrade DVD is performing a check on your computer to see if it is one that shipped with Tiger OS. I've never run into this myself but there's anecdotal evidence out there.

    If it is indeed performing that check, and your computer hasn't been upgraded to Leopard, then it is disqualifying you.

    Erasing your drive probably won't help, don't!

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