The people that are you will find on MacRumorsand thread like the one on X-Plane. You do need Mountain lion.

The new Mac GTX680 rom works on many GTX680 2GB cards. It will NOT work on your card if the EEPROM is not 256K. It will NOT work on any 'oddball' cards that difer from reference. It will NOT work on 4GB cards. It can NOT be flashed in OSX, you will need DOS or Windows to flash it.

GTX 680 (2 or 4MB VR) and X-Plane 10(12345)

Mac Rom Image

Barefeats tested those too:

Gtx 680 Mac Rom Hacked Download

May 10th, 2013 -- Do the newest GPUs run faster on the 2010 Mac Pro than on the 2009 and 2008 Mac Pro?

April 26th, 2013 -- PART THREE: EVGA GeForce GTX 680 Mac Edition versus the 'Sharks' (insane GPUs like the GeForce GTX 580 Classified and GTX 690)

April 18th, 2013 -- PART TWO: EVGA GeForce GTX 680 'Mac Edition' Versus Past and Present Mac GPUs running Pro Apps

April 16th, 2013 -- PART ONE: EVGA GeForce GTX 680 'Mac Edition' versus Past and Present Mac GPUs running OpenGL accelerated Games and Benchmarks

Would have thought you have been around here long enough to have seen these.

Gtx 680 Mac Rom Hacked Games

Jun 22, 2013 4:10 PM