Target Display Mode not working with mid-2011 iMac and 2012 Mac Pro (power mac)
So I am trying to use my mid-2011 21.7 in iMac as a display for my 2012 mac pro. I have read whole bunch of forums and support pages, and from what I can tell it should work but nothing happens when both are connected via thunderbolt and I press cmd-f2. I have also tried doing fn-cmd-f2 and nothing happens. I have rebooted both machines with no luck. Any idea what I am doing wrong here?
iMac, OS X Yosemite (10.10.4)