Hmm, I found this post: https://discussions.apple.com/thread/4194229
Mentions that you need the Accell active dual-link DVI adapter, and that the Monoprice variant wont work.
Ordered it, we'll see how it goes.
I have the PCBank PB2700 Super– works fantastic on my Windows 7 PC.
Picked up the Monoprice Dual-Link DVI active adapter to use it with my Macbook Pro Retina, but I'm having no such luck. The MBPR simply doesn't see the PCBank. It...