External USB drive works on my G4 powerbook but not in my new iMac

in Genius Bar edited January 2014
I have a WD external USB drive that works fine on my G4 PowerBook but when I plug it in the new iMac it doesn't mount. It works fine under Parallels on the same machine.

Any ideas how to fix this?



  • Reply 1 of 5
    MarvinMarvin Posts: 15,171moderator
    When you open Disk utility in /applications/utilities, does the drive show up in the left sidebar? If so and there is a partition under it, will it let you mount it if you select it?
  • Reply 2 of 5
    No - it doesn't show up
  • Reply 3 of 5
    MarvinMarvin Posts: 15,171moderator
    Does it do this after a reboot too?
  • Reply 4 of 5
    Originally Posted by Marvin View Post

    Does it do this after a reboot too?

    Yep. Opening up VMWare or Parallels is the only way I can access the drive or plug it in my G4 PB.
  • Reply 5 of 5
    MarvinMarvin Posts: 15,171moderator
    That's a weird problem but other people seem to have had issues like that:



    I don't recommend following the steps in the first one as that involves installing a third party EFI shell but I just posted it to show people have had similar problems.

    I would try to use the USB prober utility from the developer kit and try to get the drive to mount that way. I uploaded it for you to save you getting the developer kit - it should run without the full kit:


    To download, you have to put in the number, hit submit and wait 30 seconds.
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