The MIS Department at my place of employment damaged my old Cinema Display and I had requested the new Cinema Display as a replacement. Well, to my surprise, the new 24" Cinema Display needs a Mini Display Port to hook up to that is standard on the new mac book pro, but not on the older Mac Pros. I am currently using a 2x 2.66Ghz Dual core Intel Xeon Mac Pro circa 2007 (OSX 10.4.11). My MIS department ordered a new video card (NVIDIA GeForce GT 120), but that proved to not be compatible with my Mac. I read somewhere that the ATI Radeon HD 4870 card would solve this problem, but I don't want to go through all the paperwork and approvals only to find out when it arrives that this too is incompatible. Anyone have success with ATI Radeon HD 4870 Card and an Apple 24" Cinema Display working on an Mac Pro machine 2007 or earlier?