external monitor, two seperate resolutions

Discussion in 'iMac' started by bmc1818, Nov 21, 2009.

  1. bmc1818 macrumors member

    Sep 14, 2005
    I am thinking about getting an iMac. When I hook up an external monitor to my older mbp it switches the resolution of the screen to the lower resolution of my lcd tv. On the new iMacs will this happen? Can I have two separate resolutions running on each screen?
  2. thegoldenmackid macrumors 604


    Dec 29, 2006
    dallas, texas
  3. bmc1818 thread starter macrumors member

    Sep 14, 2005
    What do you mean by primary and secondary. The main(primary screen) would be the screen of the imac, but I would also have a tv hooked to it. Would both the screens have an independent resolution?
  4. zaphoyd macrumors regular

    Jun 25, 2002
    The iMac is able to do both mirroring (show the same thing at the same resolution on both displays) or spanning (extend the desktop over both displays with each at its native resolutions (which can be different from each other).

    I have a 20 inch iMac (1650x1080) connected to a 1920x1200 external and both run at those resolutions. I plan to get a 27 inch and run it with the 1920x1200 display.

    If your MBP is switching resolutions when you plug in your tv go to system prefs/monitors and uncheck mirroring (or press the display mode switch function get (F7 on my MBP icon has two rectangles overlapped) to switch to running different resolutions on each display.

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