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  1. #1


    Member Since
    Feb 20, 2011
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    2
    Specs:
    27" iMac (mid 2010)
    Question Split Mini Displayport question
    I just bought my first Mac, a 27-inch iMac refurb. I can't get over the display. It's the best I've ever seen, nevermind used. I love it.

    I'm wondering now if I can split the Mini Displayport, perhaps with something like this.

    Ultimately I want my HDTV connected to the Mini Displayport as an extended monitor for the iMac. I also want my Win 7 Thinkpad connected, so I can Command+F2 between Apple and Windows environments.

    I don't know if standard splitter will work, because on one Mini Displayport I'd be pumping out to the TV and on the other I'd be pumping in from my PC.

    Has anyone done this or something similar, perhaps with a Mac Book?

    Thanks in advance.

  2. #2

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
    Location
    Texas, where else?
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    26,455
    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Your iMac has two separate mdp ports. One is video in, one is video out. No, you're not going to plug one cable into the video out port and expect to get video in.

    I have never yet seen a two way video port on any device; be it a TV, monitor, a/v receiver, or a computer.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

  3. #3

    mrplow's Avatar
    Member Since
    Oct 01, 2007
    Location
    UK
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    6,812
    Specs:
    27" iMac i7 (2011) 10.11, Mac Mini i5 (2014), iPhone6s, Apple Watch, iPad Air 2, New AppleTV (4?)
    Not to contradict . . but . . . I have the late 2009 27" iMac and it has a single Mini Display Port (combined in and out). As far as I can tell from the pics on the Apple site the 2010 model is the same. Not sure which the OP has.

    However, I agree that it's very unlikely that adapter will work. Perhaps worth a go if you can return it if/when it doesn't work.

    I think the difficulties will come because the adapter isn't smart enough (or maybe not even wired in the right way) to work out which device is an input and which is out and how to handle it when they are both present and on.
    Not been around these parts for a while. Trying to change that . .

    Please use the reputation system if you think you've been helped - bottom left of this post

  4. #4


    Member Since
    Feb 20, 2011
    Posts
    2
    Specs:
    27" iMac (mid 2010)
    Quote Originally Posted by mrplow View Post
    I have the late 2009 27" iMac and it has a single Mini Display Port (combined in and out). As far as I can tell from the pics on the Apple site the 2010 model is the same.
    Correct. There's only one MDP on my June 2010 iMac.

    I have never yet seen a two way video port on any device;
    Actually, that's exactly what MDP is, a two-way video port. It is self-regulating, on a hardware level, so it knows it's getting video in when a laptop is connected. (See this thread about it.) And it knows when it needs to pump out when a second display or television is connected.

    The question is whether it will know to do this if a splitter is installed. Perhaps the first question, is has anyway ever split a MDP, period. Then if so, does input/output toggle with the Command+F2 function ...

  5. #5

    bobtomay's Avatar
    Member Since
    Dec 22, 2006
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    Specs:
    15" MBP '06 2.33 C2D 4GB 10.7; 13" MBA '14 1.8 i7 8GB 10.11; 21" iMac '13 2.9 i5 8GB 10.11; 6S
    Well, shiver me timbers. Guess I just "assumed" there were two separate ports. Learn somthin' new every day. Reckon I better do some studyin' up on this new fangled contraption.
    I cannot be held responsible for the things that come out of my mouth.
    In the Windows world, most everything folks don't understand is called a virus.

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