Does anyone know of a way to install an older version of OS X on a different partition in 10.12?

Discussion in 'macOS Sierra (10.12)' started by monkeybagel, Oct 2, 2016.

  1. monkeybagel macrumors 65816

    Joined:
    Jul 24, 2011
    Location:
    United States
    #1
    I have a Mac Pro 5,1, and I am aware of the ./createinstallmedia to create a USB bootable drive, but does anyone know of a way to force the installer for El Capitan or another build of OS X to launch from 10.12 to be able to select another drive or partition to install to? I imagine if SIP was disabled one could edit the OS X version file and change it to 10.11 to fool the installer, but that is a little too much trouble and could be problematic. Anyone have any other ideas?

    I actually tried the ./createinstallmedia and it failed after erasing the USB drive, in 10.12 but worked on another Macintosh running 10.11, telling me there is no problem with the drive.
     
  2. CoastalOR macrumors 68000

    CoastalOR

    Joined:
    Jan 19, 2015
    Location:
    Oregon, USA
    #2
    Try using Diskmaker X to create a bootable USB installer with El Capitan on it. It has worked well for me, but then I have also had good luck with createinstallmedia.

    Was this the Terminal code that you used (assuming the USB stick would have to be named Untitled)?
    Code:
    sudo /Applications/Install\ OS\ X\ El\ Capitan.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ El\ Capitan.app --nointeraction
    
     
  3. monkeybagel thread starter macrumors 65816

    Joined:
    Jul 24, 2011
    Location:
    United States
    #3
    Yes it was. I have used that command many times in the past with no issues, but I don't recall attempting to use it from a newer .1 build of OS X to create install media for a -.1 build.
     

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