G5 What does the ambient light sensor do?

Discussion in 'PowerPC Macs' started by Passive101, Dec 6, 2008.

  1. Passive101 macrumors regular

    Dec 5, 2008
    http://www.apple-history.com/ I went here. I have found out the iMac is a 2nd gen iMac G5. It has an ambient light sensor. I put my hand over it and it doesn't appear to actually do anything.

    What is it supposed to do?

    Do new ones have it? I have a 20" aluminum one as well, but don't see a sensor.
  2. Vulcan macrumors 65816


    Jul 17, 2008
    Pittsburgh, PA
    I think that it adjusts the screen brightness.
  3. Passive101 thread starter macrumors regular

    Dec 5, 2008
    Why is it on the bottom of the iMac then?
  4. nakile macrumors regular

    Jun 30, 2007
    I believe it was for the sleep indicator light on the front of the computer.

    The idea was when you shut off all the lights in your house to go to bed, the light would go out so that you didn't have this flashing light during the middle of the night when you were trying to sleep.

    The aluminum iMacs don't have any indicator lights on them at all, so they removed it.
  5. Passive101 thread starter macrumors regular

    Dec 5, 2008
    that makes sense. Thanks
  6. holden15 macrumors member

    Sep 8, 2008
    Austin, TX
    On my MacBook Pro, the ambient light sensor adjusts the screen and keyboard brightness.

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