Hi all! I have a Macbook pro (late 2013) and an Apple 27" Theatre display (2010) that I am trying to use the theatre display as a second monitor. The sound works with the USB cable and the magsafe to magsafe 2 adapter I bought works fine, however there is no picture on the monitor. My macbook won't even detect the monitor. The monitor cable is a mini display port male end. I plugged it into the macbook's thunderbolt port (female end). Like I said, the macbook isn't even detecting the monitor so is there a compatibility issue with the mini display cord being plugged into the thunderbolt port of my macbook? Other than a hardware issue (I opened up the monitor and didn't see anything obvious) I don't know what else it could be and I had heard there were issues in communication between mini display and thunderbolt. PLEASE HELP!