Installing Mountain Lion on an external drive

Discussion in 'Mac Pro' started by eVasilis, Apr 23, 2018.

  1. eVasilis macrumors member

    Joined:
    Jan 13, 2010
    #1
    Hi all, I am running HS 10.13.4 and I have been trying to install Mountain Lion on en external drive so I can use dvd studio pro. So far, all I have tried has failed. Whenever I restart form the installer USB stick all I get is a message that the mac was not not shut down properly and the mac boot again with High Sierra. Any ideas? My mac is a 12-core 2010 Mac Pro.

    Thanks!
     
  2. chabig macrumors 603

    Joined:
    Sep 6, 2002
    #2
  3. eVasilis thread starter macrumors member

    Joined:
    Jan 13, 2010
    #3
  4. chabig macrumors 603

    Joined:
    Sep 6, 2002
    #4
    Rats. If I think of anything else I will post again.
     
  5. eVasilis thread starter macrumors member

    Joined:
    Jan 13, 2010
    #5
    Thanks a lot!
     
  6. h9826790 macrumors G4

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
  7. eVasilis thread starter macrumors member

    Joined:
    Jan 13, 2010
    #7
    Thanks, I'll give this a try!
     
  8. eVasilis thread starter macrumors member

    Joined:
    Jan 13, 2010
    #8
    Unfortunately, Mountain Lion, Mavericks and Yosemite fail to install. As soon I initiate installation, having booted up from their respective installers, those being on a DVD or USB stick, the process is interrupted by a kernel panic. I can only install 10.6.8 which is of no use as I need NVIDIA's drivers for my GTX 980. It seems to me that the only reason why this is happening, is the upgraded firmware prior to the installation of 10.13.x
     

Share This Page