Hardware Test will not start

Discussion in 'Mac OS X Lion (10.7)' started by aicul, Feb 28, 2014.

  1. aicul macrumors 6502a

    Jun 20, 2007
    no cars, only boats

    Trying to get the hardware test to work without success.

    In principal I restart, press "D" before the start chime and wait. I should then get the Hardware test. But I don't.

    I even dug our the Leopard install disks and tried booting from the disk, no success.

    Anything special I should be doing ??

    My iMac is a 1st gen MBair with external apple CD. OSX 10.7.5

  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    I not clear if you have an iMac or a Macbook Air? The AHT is accessed differently depending on what year/model your Mac is. Give this a look for your specific machine.
  3. aicul thread starter macrumors 6502a

    Jun 20, 2007
    no cars, only boats
    I have sorted this out.

    Weaselboy; thanks for input, but No that Apple page does not provide input.

    Actually, further to extensive googling it appears that the Lion update DID NOT carry forwards the AHT.

    And previous disks of Snow Leopard and Leopard could not help.

    I actually had to go to the original disks (Tiger) shipped with the MacBookAir and use unix commands to copy the AHT back.

    To do that I used Pacifist to extract the installer from the disk and then unix cp -R /[temp folder]/CoreServices/.diagnostics /System/Library/CoreServices

    Frankly, apple could have fixed this in one of the multiple updates it did to lion.

    Come to think of it, things such as AHT, Target mode, etc. should not be activated "only" thru obtuse keys, but thru simple settings in the Preferences Panel. Something like, at next startup run ...

    What a waste of time ! Zero points to apple this time round

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