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  1. #1

    Member Since
    Jul 15, 2008
    Sleep iMac display with out sleeping external displays?
    Hello all, quick question:

    I am using an iMac (last generation), Intel core 2 duo, 1g running 10.4.11

    For a project, I have two external displays attached (projectors). One is though the mini-dvi port, the other with an external usb graphics card, this guy:

    I want to be able to sleep the iMacs display without turning off the connected displays. My MacBookPro is capable of doing this. The computer needs to be running for an exhibition nonstop for 3 months, and I fear it will overheat while running this unnecessary home display.

    Any thoughts?


  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Keller, Texas
    2017 27" iMac, 10.5" iPad Pro, iPhone 6s+, iPhone 7+, Numerous iPods, High Sierra
    I don't think you can turn off the iMac display while having an external display on. The MacBook and MacBook Pro machines can operate in "clam shell" mode with the internal display off and external on. However, the built in display on the iMac is not designed to do that.

    I guess it's possible to hack into your iMac and disconnect the display but that's not something I would recommend.


  3. #3

    Member Since
    Jan 13, 2007
    iMac 20" 2.4/4/320/Leopard, 12" PowerBook G4 1.5/1.25/80/Tiger
    Shades is a helpful utility for dimming one of the displays but there is no way I know of to sleep them individually. For a permanent exhibition it would be a good use for an old model Mac Mini.

    Current: 20" iMac 2.4/4/320/Leopard / Dell 2407WFP / Leopard
    Portable: 12" PowerBook G4 1.5/1.25/80/Tiger / iPhone 3G White 16GB
    Former: PowerMac G5 Dual 1.8 / iMac G4 800 / iBook G3 700 / PowerMac 7500, 3G iPod 10GB, 5G iPod 30GB

  4. #4

    Member Since
    Dec 29, 2007
    try downloading InsomniaX and see if that helps at all

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