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  1. #1


    Member Since
    Jun 22, 2007
    Posts
    23
    Intel iMac brightness/power management problem
    Hello,

    I have a problem with my iMac which I hope to address. My machine is an Intel based the entry level iMac 1.86GHz Core Duo system with OS X Leopard 10.5.5 installed. This problem has been present every since I had ordered the used machine, and installing various update seems to have did nothing to address the issue. The problem occurs when ever I schedule the Mac to shutdown/restart. After I turn it back own, the screen’s brightness is turned all the way down, and I have to manually adjust screen’s brightness to its original settings.

    Is this a know issue with iMacs, and if so is there any way to fix this problem? Thank you.

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    54,142
    Specs:
    Late 2013 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    Read the following Apple KB article. Try the procedure given in the article and let us know.

    Regards.

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