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Enabling target display mode

23752 Views 22 Replies Latest reply: Oct 24, 2013 10:00 AM by jpau00 RSS
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LawrenceHare Calculating status...
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Jul 5, 2012 9:17 AM

I am running a new 27" iMac and a MBP 17", both running 10.7.4. Both have Thunderbolt ports. I bought a thunderbolt cable and wish to use the iMac as an external screen for the MBP - Target Display Mode. I have connected both togther via the thunderbolt cable and used Cmd-F2, but nothing. System Information identifies the Thunderbolt ports (2 on the iMac) and nots No Devices Connected.

 

Cannot make it work.

 

Any ideas?

 

Thanks - Lawrence

  • BDAqua Level 10 Level 10 (114,800 points)
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    Jul 5, 2012 11:47 AM (in response to LawrenceHare)

    No idea, but I wonder if the TB cable is the same as a Display port to TB cable?

  • BDAqua Level 10 Level 10 (114,800 points)
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    Jul 5, 2012 3:18 PM (in response to LawrenceHare)

    I'm not sure either, I know it's compatible at least one way, just can't find out for sure the other way.

  • captfred Level 7 Level 7 (26,225 points)
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    Jul 5, 2012 3:28 PM (in response to LawrenceHare)

    To do Target Display mode between two Thunderbolt equipped machines, you must use a Thunderbolt cable.

  • captfred Level 7 Level 7 (26,225 points)
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    Jul 5, 2012 3:42 PM (in response to LawrenceHare)

    Just to recap the procedure..  You hook them together and on the iMac 27" keyboard you hold down Command and click F2

  • captfred Level 7 Level 7 (26,225 points)
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    Jul 5, 2012 3:58 PM (in response to LawrenceHare)

    Try  FN CMD F2     This can be reversed in the Keyboard Preference pane > Use All F1, F2, etc keys as standard function keys.

  • captfred Level 7 Level 7 (26,225 points)
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    Jul 7, 2012 10:43 AM (in response to LawrenceHare)

    Thanks for the feedback Lawrence.  I'll remember this for future TB target display mode problems. 

  • Kenneth Cohen1 Calculating status...
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    Aug 13, 2012 9:35 AM (in response to captfred)

    My problem is along the same lines. I have a new Mac Mini with a Thunderbolt port, and a 2010 27 inch iMac with a Mini Display Port. I have connected them with a Thunderbolt to Thunderbolt cable, but target display mode does not work, command-F2 just produces beeps. (I started up the Mini first, then the iMac. I'm using a wired 2007 aluminum Apple keyboard connected to the iMac.

     

    At a nearby Apple store, I was told that I need to use a Mini Display Port to Mini Display Port cable for this, that a Thunderbolt cable will not work - but Apple no longer sells a Mini Display Port to Mini Display Port cable (nor can I find one anywhere else), so how am I supposed to do this?

     

    Any help will be most appreciated, I'm pretty frustrated. Thanks.

  • Scottiemac11 Calculating status...
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    Aug 16, 2012 10:50 PM (in response to LawrenceHare)

    Hey Lawrence,

     

    I've read over this post and I am still not having any luck!

     

    MBP 15" 2012 > iMac 27" 2012 (both with thunderbolt) using a thunderbolt cable and pressing command+F2 won't work.

     

    I don't have a standard keyboard but I pulled up the on-screen keyboard but it still doesn't work!!

     

    Any ideas?

     

    Thanks in advance,

    Scott

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