connect thunderbolt macbook pro to 27" mini displayport imac?

Discussion in 'iMac' started by jmck, Sep 2, 2012.

  1. jmck, Sep 2, 2012
    Last edited: Sep 3, 2012

    jmck macrumors newbie

    Joined:
    Jul 18, 2002
    #1
    Hi,

    I have a 2009 17" imac, which has support for target display mode over mini displayport.

    my question is, if I got a thunderbolt equipped macbook pro, would I be able to use target display mode by running a mini displayport cable between them?

    More clearly: I want to use my 2009 Mini DisplayPort iMac as a 2nd monitor for a Thunderbolt Macbook Pro. I know this wouldn't work with a Thunderbolt cable, but maybe with a mini displayport cable?
     
  2. bungiefan89 macrumors 6502a

    Joined:
    Apr 5, 2011
    #2
    This should work.

    Thunderbolt ports can output a signal over a mini-displayport connection just fine, but they only accept thunderbolt signals as an input.

    I often have my 2011 iMac connected to an external monitor, and that connection is via a DVI cable and a DVI/mini-displayport adapter, so your connection between the laptop and the iMac should work fine. :)
     
  3. phairphan macrumors 6502a

    phairphan

    Joined:
    Sep 21, 2005
    Location:
    Reject Beach
    #3
    I'm fairly certain this will not work. I believe that both machines need to have Thunderbolt ports for target display mode to work. I recall this being a bit of a sticking point when Thunderbolt ports were introduced last year.

    While Thunderbolt ports can output a displayport signal which works with regular monitors, I don't believe this works for target display mode.

    Perhaps someone with first-hand experience will be able to confirm either way.
     
  4. thekev macrumors 604

    thekev

    Joined:
    Aug 5, 2010
    #4
    I'm not sure on target display mode. I just wanted to add that not all cables perform alike. If a proof of concept can be determined, it's important to note the cable used. Some of the cheap ones are a bit flaky and there are a lot of things where something works with a cable but not the adapter or a mini displayport cable works while the Apple thunderbolt cable will not work. The point being if someone with a working solution is found, it's important to note the full details of what worked.
     
  5. jmck thread starter macrumors newbie

    Joined:
    Jul 18, 2002
    #5
    That does make it sound like it should work. I really need to borrow a newer Macbook Pro from work to try this out… my work Macbook Pro is pre-thunderbolt)
     
  6. seysearles macrumors newbie

    Joined:
    Jun 2, 2011
    #6
    Did this work?
     

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