Skip navigation

Late 2009 imac as second display for new (late 2012) imac. How to?

660 Views 6 Replies Latest reply: Jan 10, 2014 6:19 AM by RichieViBE RSS
GMacD1 Calculating status...
Currently Being Moderated
Mar 16, 2013 6:40 PM

I have a late 2009 imac 27 that I would like to use as a second display for my late 2012 imac 27. Has anybody connected them successfully? I am getting very mixed information on the topic.

Aperture 3, OS X Mountain Lion
  • mende1 Level 10 Level 10 (89,470 points)

    See >


    As you can see, a 27-inch iMac (yours has got Mini DisplayPort) can be used as an external display for any other Mini DisplayPort or Thunderbolt Mac, as your new iMac. You just need a Mini DisplayPort to Mini DisplayPort cable (note that the Late 2009 iMac can't detect a Thunderbolt cable) and put the Late 2009 in Target Display mode, following the steps of this page

  • mende1 Level 10 Level 10 (89,470 points)

    It's confusing. In my opinion, if you aren't sure if it will work, you can go to a different solution: use ScreenRecycler. This app allows you to use a Mac or PC as an external display for another one wirelessly, without connecting both Macs or PCs, and you can be sure that it will work, because you just have to connect both Macs to the same network

  • mende1 Level 10 Level 10 (89,470 points)

    You are welcome

  • RichieViBE Calculating status...

    Hi there. I am in the ecxact same situtaion as yourself. I have a late 2012 iMac as my main computer and also a late 2009 iMac that I wish to use as a second monitor for added screen real estate when using Logic Pro X etc. I've just purchased the MDP to MDP cable. When I connect the lead my late 2012 iMac screen is going black and becomes unresponsive (CMD F2 not doing anything). Is there anything you can suggest to help me get the late 2012 to become the primary display and the late 2009 as the extra display? Am I missing anything? Any help or light on the matter is greatly appreciayted. Thank you


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.