intel mac booting external drive

Discussion in 'Mac Basics and Help' started by derajfast, Apr 13, 2006.

  1. derajfast macrumors 6502a

    Joined:
    Mar 24, 2004
    #1
    i have to partition the drive or something before i can boot off the external?
     
  2. tonyl macrumors 6502

    Joined:
    Jan 18, 2006
    #2
    Of course, you need to install OS on it first.
     
  3. derajfast thread starter macrumors 6502a

    Joined:
    Mar 24, 2004
    #3
    haha well of course

    i already have the OS installed on there, but i heard i cant boot off that now with the new intel macs?
     
  4. derajfast thread starter macrumors 6502a

    Joined:
    Mar 24, 2004
    #4
    i heard something about formatting it as an GPT partition before you can install OS X on it?

    someone please help me out here?

    thanks
     
  5. Harryc macrumors member

    Joined:
    Mar 22, 2006
    Location:
    New York
    #5
    "The standard disk partition format on an Intel-based Macintosh computer differs from the disk partition format of a PowerPC-based Macintosh computer. By default, internal hard drives on Intel-based Macintosh computers use the GUID Partition Table (GPT) scheme and external drives use the Apple Partition Map (APM) partition scheme. To create an external USB or FireWire disk that can boot an Intel-based Macintosh computer, select the GPT disk partition scheme option using Apple Disk Utility."
     

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