I am running Skyrim on my Mac Pro (late 2013) with an Asus PQ321 4k display at 60 Hz through Parallels 9 at 3840x2160 resolution -- almost 4k. I was shocked to see that the frame rate is completely playable. See for yourself: http://youtu.be/3ODlmaFjs0w My Mac Pro is 3.5 GHz six core Intel Xeon, with 128 GB of RAM. I have the dual D500 video card. In Parallels 9, I have maxed out the video memory and assigned 16 GB of RAM. If you have any questions about this set up, please let me know in the comments.
