New iMac won't boot into Lion

Discussion in 'iMac' started by seble, Dec 26, 2012.

  1. macrumors 6502a

    Joined:
    Sep 6, 2010
    #1
    Have Lion on an external HD, and a piece of software is playing up on this imac so wanted to boot into lion.

    When I select the Lion external HD as bootup disk it just comes up with a barrier symbol on the screen (circle with line across it). Does that mean because my machine shipped with ML, it won't boot Lion?

    Thanks
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    If it is a late 2012 Mac, yes, as Mac OS X 10.7 Lion does not contain drivers for such hardware. If it is an early 2012 Mac, you need 10.7.5 on the external HDD to boot from it.
     
  3. Moderator

    maflynn

    Staff Member

    Joined:
    May 3, 2009
    Location:
    Boston
    #3
    On Macs the lowest version of OSX you can use is the version that it came with. So if you're trying to boot into an older version, i.e., 10.7, then that will not work
     
  4. simsaladimbamba, Dec 26, 2012
    Last edited: Dec 26, 2012

    simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #4
    Though there are exceptions, like the late 2011 MacBook Pros for example.
     
  5. thread starter macrumors 6502a

    Joined:
    Sep 6, 2010
    #5
    Thought that would generally be the case. Oh well, I'll have to think of something else. Thanks guys.
     

Share This Page