Converting OS X to a .dmg file

Discussion in 'OS X El Capitan (10.11)' started by jc.farley, Mar 10, 2017.

  1. jc.farley macrumors newbie


    Feb 22, 2017
    Hello, I am looking to install OS X El Capitan on a 1,1/2,1. I have already made many adjustments for doing so, but I am stuck.

    I have an install app for installing the OS, which of course doesn't work. I want to create an "installed" .dmg file, then simply restore it to my target drive. My problem is that I simply don't know how to do that. I am a little bit of a MacNewbie.

    I would really appreciate any help!
  2. Fishrrman macrumors G4

    Feb 20, 2009
    What is a "1,1/2,1" ?

    I've been around Macs for 30 years, and have no idea what you're talking about.
  3. chrfr macrumors 603

    Jul 11, 2009
    Presumably it's a Mac Pro from the 2006-2007 era.
  4. jc.farley thread starter macrumors newbie


    Feb 22, 2017
    It's a mod, meaning a mp1,1 that has been converted to a 2,1 (via BIOS flash).
  5. jbarley macrumors 68030


    Jul 1, 2006
    Vancouver Island
    I knew that, and I've only been around Macs for 29 1/2 years.:p
  6. Nermal Moderator


    Staff Member

    Dec 7, 2002
    New Zealand
    Typically you can use the "createinstallmedia" command-line tool to make a bootable USB drive. Instructions are here, although I can't guarantee that it'll work if you've hacked around with the original .app.

Share This Page