Retina MBP using iMac as External Display not working

Discussion in 'Mac Basics and Help' started by mackry, Jun 29, 2012.

  1. mackry macrumors member

    Joined:
    Oct 3, 2007
    #1
    I have my Retina MBP connected via Thunderbolt cable from Apple to a 2011 iMac with Thunderbolt ports. Both machines are on. When I press CMD + F2 on the iMac to change the Target Display Mode, nothing works. I've tried restarting both machines, doing a SMC reset – still nothing.

    Any ideas? Thanks!
     
  2. JediMeister macrumors 68040

    Joined:
    Oct 9, 2008
    #2
    Did you install all of the available software updates for the rMBP before trying to use Target Display Mode? See this.
     

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