I just recently received my 2012 macbook pro with retina display. I am wondering if I will be able to connect a standard mini-display port cable from the thunderbolt port of the retina MBP to the mini-display port on the late 2009 iMac so that I can use the iMac as an external display for the MBP? I can't find much on the internet about this being possible unless you have an adapter, but I thought I'd ask here anyways to see if someone has a solution or can answer if it's possible. Thanks again.