How-to force iMac to output only to external monitor?

Discussion in 'macOS' started by Jack Flash, Nov 2, 2008.

  1. Jack Flash macrumors 65816

    Joined:
    May 8, 2007
    #1
    I'm planning on hooking my iMac up to a HDTV and want it to output video only to the TV. Is there a way to do this. I seem to be only able to extend and mirror.
     
  2. mkrishnan Moderator emeritus

    mkrishnan

    Joined:
    Jan 9, 2004
    Location:
    Grand Rapids, MI, USA
    #2
    As far as I know, there's never been a way to do this... the best I can get to is to make the internal display have a black background and make the external display primary -- but this is a hassle, and it's obviously not "off."
     
  3. seamuskrat macrumors 6502a

    seamuskrat

    Joined:
    Feb 17, 2003
    Location:
    New Jersey USA
    #3
    I second that. Mirror screens.

    Dim main screen to darkness and that is the best you can do without a potential software hack. There is no setting that is user accessible for this. There MAY be a hack for this, but I am unaware of one offhand. IME, hacks of this type do lead to potential instability.

    I have my iMac hooked up to anice Cinema display and th iMac is tucked away out of sight with the same dimmed configuration.

    I needed the features of the iMac without the cost of the MacPro with the screen real estate of the Cinema. The mini was too underpowered. So I am that mythical mid tower Mac users without a product.
     

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