How to do a hardware test under Lion

Discussion in 'iMac' started by donli, Nov 13, 2011.

  1. donli macrumors newbie

    Joined:
    Nov 11, 2011
    #1
    I just bought a used 27'' iMac. The model is Late 2009. 2.66G i5.

    How to do a hardware test under Lion? I hold on 'D' when it start, but can not enter the hardware test software. I changed to a USB keyboard, it is the same.

    Any suggestions?
    Thanks in advance!
     
  2. Matthew Yohe macrumors 68020

    Joined:
    Oct 12, 2006
    #2
    Holding D only works if you have the hardware test DVD inserted.
     
  3. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #3
    Starting with Macs made in mid-2007, Apple put the hardware test in the System folder and it was acceptable while holding down D on restart. But if you wiped the hard drive and reinstalled using an OS X media that was not the reinstallation disc, this feature was removed. It is also removed for some newer Macs that have a recovery partition.
     
  4. donli thread starter macrumors newbie

    Joined:
    Nov 11, 2011
    #4
    I think it is the case. Any suggestions how to do it if the hard drive is wiped.
     
  5. Intell macrumors P6

    Intell

    Joined:
    Jan 24, 2010
    Location:
    Inside
    #5
    Use Pacifist to reinstall the diagnostics files for your machine from its reinstallation disc.
     

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