I try to use my iMac as a external screen or otherwise if possible, but when I press ⌘ CommandF2 nothing happened. I also try fn⌘ CommandF2 just to be sure
MacBook Pro 2012 iMac 27" 2012
Using Thunderbolt 2
6
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Have you had a good look at Use your iMac as a display with Target Display Mode?– Monomeeth ♦Commented Feb 11, 2017 at 11:09
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@Monomeeth yes, but I have done this before, but now I can't. that why I ask– TheCrazyProfessorCommented Feb 11, 2017 at 11:10
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How long has it been since this worked for you? And are you already logged into the MacBook Pro before trying to press Command-F2?– Monomeeth ♦Commented Feb 11, 2017 at 11:13
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@Monomeeth I think is was in Yosemite. And yes I am logged in before press cmd + F2– TheCrazyProfessorCommented Feb 11, 2017 at 11:15
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Both the MBP 2012 and iMac 2012 have Thunderbolt 1 ports. A TB2 cable should work, but I would take a look at that as well just to be sure.– AllanCommented Feb 11, 2017 at 12:28
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1 Answer
Well, i found out why... I just needed to turn the cable around. For some reason, the Thunderbolt cable can be plugged in the wrong way.