Booting from external drive

Discussion in 'MacBook Pro' started by jbrown, Jan 27, 2014.

  1. jbrown macrumors 6502a

    jbrown

    Joined:
    Jul 7, 2002
    Location:
    London
    #1
    Can I boot a current retina MBP from an external drive with Mountain Lion?

    cheers

    :)
     
  2. heisenberg123 macrumors 603

    heisenberg123

    Joined:
    Oct 31, 2010
    Location:
    Hamilton, Ontario
    #2


    yes you can, you would have to first make a clone using something like carbon copy cloner to your external

    make sure the external is formated GUID and OSX Journaled

    once the clone is completed you plug it in hold option on a reboot and you will see the extenal drive as a choice to boot from
     
  3. jbrown thread starter macrumors 6502a

    jbrown

    Joined:
    Jul 7, 2002
    Location:
    London
    #3
    Thanks for the quick reply.

    Just to clarify, I have already got an external drive with the latest ML on it…I'd like to boot from it as it is now ( with ML and all my programs ).

    Possible? :)
     
  4. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #4
    By current, do you mean the very newest model that came out in October? Those machines came with Mavericks and Mountain Lion will not have the drivers to run them.
     
  5. jbrown thread starter macrumors 6502a

    jbrown

    Joined:
    Jul 7, 2002
    Location:
    London
    #5
    That was what I wanted to achieve….I currently have a 2012 non retina MBP,
    and want to upgrade to a retina MBP.

    I have an expensive to upgrade program ( Vectorworks ) that won't work with
    Mavericks, but is fine on ML…so if I could only get a rMBP to run ML:rolleyes:
     
  6. heisenberg123 macrumors 603

    heisenberg123

    Joined:
    Oct 31, 2010
    Location:
    Hamilton, Ontario
    #6
    I believe you cant downgrade to an OS that was never on your machine
     
  7. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #7
    Sorry... nope. Mountain Lion won't run on the new one. :(

    Can you update to Vectorworks 2014?
     
  8. jbrown thread starter macrumors 6502a

    jbrown

    Joined:
    Jul 7, 2002
    Location:
    London
    #8

    Very expensive to do that:(
     
  9. Fishrrman macrumors G3

    Joined:
    Feb 20, 2009
    #9
    [[ Just to clarify, I have already got an external drive with the latest ML on it…I'd like to boot from it as it is now ( with ML and all my programs ).
    Possible? ]]

    That depends...
    ... on whether the -version- of ML that you have on the external drive is capable of booting your Mac. If you have an earlier version of the system than the one required by your current Mac, chances are it won't be "good enough".

    The easiest way to create a bootable clone is with CarbonCopyCloner or SuperDuper. CCC will even re-create the recovery partition on an external drive.

    Also, be aware that there are -some- external drives out there that won't boot the Mac, even if the OS is "correct". That's because of hardware (more likely firmware) problems with the drive enclosure itself. It has nothing to do with the software.

    How to boot from the external:
    - Restart
    - Hold down the option key and keep holding it down until the startup manager appears
    - Select the external drive (use pointer or arrow keys), then hit return.
     
  10. Weaselboy Moderator

    Weaselboy

    Staff Member

    Joined:
    Jan 23, 2005
    Location:
    California
    #10
    It has already been established OP is looking at the new Retina model and that model requires Mavericks and will not run on ML.
     

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