trouble formating external in disk utility

Discussion in 'Mac Basics and Help' started by trev, Mar 27, 2008.

  1. trev macrumors 6502

    Joined:
    Nov 11, 2006
    Location:
    St. John's, NL
    #1
  2. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #2
    I suspect that the cause is the partition scheme is set to MBR, when it should be either Apple Partition Map or GUID Partition Table. You can change this from the Partition tab of Disk Utility.
     
  3. pilotError macrumors 68020

    pilotError

    Joined:
    Apr 12, 2006
    Location:
    Long Island
    #3
    Try deleting the existing partition, then re-create it using the GUID or ??? (for PowerPC compatibility - its one of the choices).

    Once you do that, you should be able to partition it.
     
  4. wrldwzrd89 macrumors G5

    wrldwzrd89

    Joined:
    Jun 6, 2003
    Location:
    Solon, OH
    #4
    The ??? you refer to is APM, or Apple Partition Map.
     

Share This Page