Is it possible to install Leopard on an external hard drive?

Discussion in 'macOS' started by writeous, Nov 8, 2007.

  1. writeous macrumors regular

    Aug 24, 2007
    I wanted to keep Tiger as my main OS, but fiddle around with Leopard to see what all the fuss is about it. I have a Seagate 320 gb usb 2.0 harddrvie with 150 of space partioned for Tiger. Is it possible that I can install and run Leopard off the ex HD?
  2. DanB91 macrumors 6502

    Jun 12, 2007
  3. writeous thread starter macrumors regular

    Aug 24, 2007
  4. zioxide macrumors 603


    Dec 11, 2006
    I thought that Intel macs could boot of both firewire and usb. Firewire only for PPC though.
  5. DanB91 macrumors 6502

    Jun 12, 2007
    really? then dont use me as a source as i only have an ibook
  6. spinne1 macrumors 6502a


    Mar 12, 2005
    Hermitage, TN USA (near Nashville)
  7. admiraldennis macrumors regular

    Aug 19, 2002
    Boston, MA
    I'm almost positive it's Mac OS X itself that can not be started up from a USB drive, irrelevant of hardware.
  8. writeous thread starter macrumors regular

    Aug 24, 2007
    Doesnt seem to work. It keeps telling me that an error occured once it starts the installation. im going to try one more time though.
  9. koobcamuk macrumors 68040


    Oct 23, 2006
    Yes it is. And yes, use USB. I extracted the disk image to one partition and then used this to install onto the other partition.

    iBooks could only use Firewire to boot; new intels use both.
  10. writeous thread starter macrumors regular

    Aug 24, 2007
    Well everybody it works. So far so good, didint have any problems installing out side of having to partition the harddrive again.

    I was installing via a UTD disc by the way.
  11. dukebound85 macrumors P6


    Jul 17, 2005
    5045 feet above sea level
    ppc can boot only from firewire
    intel can boot from either firewire or usb 2.0
  12. smee macrumors member


    Oct 17, 2007
    edit: I just realized that you have already done this, but heres what I did.

    I did the same thing your wanting to do.
    But I have Leopard running as my main.

    I had Leopard installed on my Mac mini's internal drive, I put a little 20GB partition on it and installed Tiger.
    I then used Carbon Copy Cloner to clone everything on that partition (which had Tiger on it) to an external USB drive.
    Once it cloned it, I then erased the partition on the internal drive, and can now choose between the two OS's on startup by pressing and holding down the option/alt button (just like bootcamp does).

    You can download Carbon Copy Cloner off the Internet for free.

    Just my two cents in this,
  13. Transeau macrumors 6502a


    Jan 18, 2005
    Alta Loma, CA
    Yes, You can install 10.5 on any USB or Firewire drive, assuming that it is GUID partitioned, and large enough for the OS.

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