OK to Install Lion on external hard drive?

Discussion in 'Mac OS X Lion (10.7)' started by ohla313, Jul 29, 2011.

  1. macrumors 6502a

    ohla313

    Joined:
    Apr 24, 2010
    #1
    I have a brand new drive in an enclosure that I want to install Lion to. I made a boot disc and USB drive to do this. My plan is to install Lion onto the external drive while keeping my original hard drive in my MBP with SL.

    My main question is: Would it be ok to install Lion to a USB external drive?

    Later when Lion gets all compatibility issues settled, I plan to switch the drives. Would this be done with no complication?

    Also should I install via USB or DVD?
     
  2. macrumors 6502a

    Jerome Morrow

    Joined:
    Jun 13, 2011
    Location:
    United Kingdom
    #2
    To USB external drive is fine, but it will be slower (you already know that). There are quite few problems with firewire, so you should avoid that for now.
     
  3. macrumors 6502

    Madd the Sane

    Joined:
    Nov 8, 2010
    Location:
    Utah
    #3
    Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5)

    I had Snow Leopard booted off of an External HD until the HD died. It should be possible to do the same with Lion.
     
  4. macrumors 68030

    Joined:
    Jul 21, 2011
    Location:
    Los Angeles, CA
    #4
    It can be done, but its really not recommended...it will be very slow and most likely very unstable. Best method would be eSata if you have a card for it. Thunderbolt could handle it too....but the only MBP with thunderbolt already has Lion on it.
     
  5. macrumors 68040

    iLog.Genius

    Joined:
    Feb 24, 2009
    Location:
    Toronto, Ontario
    #5
    It can be done. I've been using Lion on an external HDD to play around with it. It is slower (depending on which application you're running or want to run) but it isn't terribly slow, in some won't even notice a big difference.
     
  6. macrumors 6502

    Joined:
    Oct 18, 2010
    Location:
    Vancouver, British Columbia
    #6
    i would carbon copy your current harddrive to the external, format your internal drive with 2 partitions, in one partition install SL and the other partition install Lion.
     
  7. macrumors 68030

    Joined:
    Jul 21, 2011
    Location:
    Los Angeles, CA
    #7
    This is a much better solution.
     
  8. thread starter macrumors 6502a

    ohla313

    Joined:
    Apr 24, 2010
    #8
    Well I have two hard drives so I rather keep them separate. I installed Lion on the new drive without a hitch. Waiting for spotlight to finish indexing. My install took 14gb of my drive when I checked it's info after I first logged in. Is this normal?
     
  9. macrumors 6502

    Joined:
    Oct 18, 2010
    Location:
    Vancouver, British Columbia
  10. thread starter macrumors 6502a

    ohla313

    Joined:
    Apr 24, 2010
    #10
    Because I eventually will use lion as my primary machine and don't want to clutter that drive.
     

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