Gestalt ID

Discussion in 'General Mac Discussion' started by 5300cs, Jan 4, 2004.

  1. 5300cs macrumors 68000


    Nov 24, 2002
    Ok, this may be a stupid question, but WTF is the/a Gestalt ID? This has been driving me crazy for a while now. I Googled & Apple site support-surfed but came up empty-handed ...

  2. TMA macrumors 6502a


    Jan 6, 2003
    Sorry I can't give a very detailed answer, and i'm not even sure it's 100% correct but here goes.

    The gesalt ID is a number that represents the family of macs that your computer belongs to. e.g Powermac Performa 6200 series = 42. Not sure how many families there are, but it must be based on something like motherboard and form factor so there could be hundreds. So basically it's just a code for your type of mac.

    Your machines gesalt ID is used when installing software, such as the Operating System, to calculate what sort of machine it's being installed on and therefor which specific componants (if any) need to be installed.
  3. Doraemon macrumors 6502

    Aug 31, 2001
    Europe (EU)
    The Machine Gestalt ID is the unique identification of a Macintosh logicboard. Its part of the ROM.

    When Apple replaced the original ROM with the NewWorld ROM in 1998, all Macs got gestalt ID 406. In order to differentiate the different models, Apple introduced the machine identifications (RackMac1,1 etc.).

    Here are some links:

    NewWorld ROM

    Machine Identification

    Machine Gestalt ID of Apple's personal computers

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