Looks like the OP disappeared?!?
Hi,
The graphics card doesn't seem easy to get 100% working. Technically this is a crossfire (of 2 amd gpu's) wich isn't supported in OS X.
I came across this thread: http://www.tonymacx86.com/viewtopic.php?f=14&t=28781
You will end up using only 1 gpu, making...