using iMac as tdm
Hi
I'm trying to connect an iMac, late 2009 model, to a retina display laptop via mini display port cable to use it as a screen. The problem is once I connect the two computers and press coomand fn f2 the screen on the laptop goes blue and it goes black on the iMac just for a few seconds and then it goes back to normal.
Also when i press the alt key i see the "detect desplays" button in the system prefrecens but I can't press it.
I have to add that I have connected my cinema display to same laptop and it work fine. I just can't see a reason why it soulhdn't work with iMac.
Any suggestions are very much appreciated.
Thanks
E
iMac, OS X Mavericks (10.9.1)