It looks like the Mac market is the new frontier for discrete graphics makers, as after Sapphire's HD 7950 Mac Edition, EVGA has stepped up and announced the new EVGA GTX 680 Mac Edition.
The EVGA GTX 680 Mac Edition looks like your standard GTX 680 graphics card except for a small Mac Edition label. It uses standard dual-slot blower style cooler, feature two dual-link DVI, HDMI and DisplayPort 1.1 outputs and support four displays.
Based on the GK104 Kepler GPU, the GTX 680 packs 1536 CUDA cores and works at 1006MHz base and 1058MHz Boost clocks and packs 2GB of GDDR5 memory clocked at 6008MHz and paired up with a 256-bit memory interface.
Some of new and key features listed by EVGA for the GTX 680 Mac Edition include Nvidia GPU Boost technology, support for four concurrent displays, Nvidia SMX Engine and CUDA technology, OpenGL 3.2 (4.3 in Windows) support and Boot Camp support.
The new EVGA GTX 680 Mac Edition is currently listed but not yet available over at EVGA's store with a US $599.99 price tag which is US $100 more expensive than yours standard Geforce GTX 680.
You can find more here.