I'm interested in running Mountain Lion on my 2006 Mac Pro. Do I have to upgrade my NVIDIA GeForce 7300 GT 256 MB video card to a NVIDIA GeForce 8800 GT 512 MB or similar to do this or can it wait until after? Can anyone give me the best and easiest way I'm only interested in ML right now no need for yosemite! My plan is to get a fresh HD and put it where my SL drive is now, order ML disc from Apple and install that way. Will this eliminate the need for an additional install drive? Processor 2 x 2.66 GHz Dual-Core Intel Xeon Memory 13 GB 667 MHz DDR2 FB-DIMM Graphics NVIDIA GeForce 7300 GT 256 MB Software Mac OS X Lion 10.7.5 (11G63) First time here can someone just provide me a link to a post on the subject it's no doubt been discussed before.