Formatting My Book?

Discussion in 'Mac Accessories' started by DougY, Apr 23, 2012.

  1. DougY macrumors 6502

    Joined:
    Dec 2, 2009
    #1
    I need to format My Book, tried using Disk Utility, but got an error msg, "Couldn't unmount disk".
    Any suggestions as to how I can get this done?
     
  2. ljonesj macrumors 6502a

    ljonesj

    Joined:
    Oct 20, 2009
    Location:
    Kingsport TN
    #2
    try restarting ur mac as my externals do that sometimes as they think a program is still using them and it wont unmount them
     
  3. DougY thread starter macrumors 6502

    Joined:
    Dec 2, 2009
    #3
    What??
     
  4. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #4
    Some background task may be keeping a file open on the external. Rebooting the Mac will ensure that this is not the case.

    B
     
  5. bcburrows macrumors 6502

    bcburrows

    Joined:
    Mar 25, 2009
    Location:
    Bristol
    #5
    You mean WD 'My Book'

    Do you mean a WD My Book external hard drive?

    With mine I have to format it by logging into it as the admin and doing it via there
     
  6. DougY thread starter macrumors 6502

    Joined:
    Dec 2, 2009
    #6
    Thats exactly what I mean, the WD My Book.
    How do I log onto it as admin?

    ----------

    I tried that, didnt work
     

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