is in beta still, I have heard. So, no guarantees about what works and what not
I know its in beta, was going to download it anyway.
The point is by the time it leaves beta it may not support the 7950.
It most likely will, but I wouldn't buy a card based on a beta piece of software.
The point is actually whether a 7950 will work with 10.8.3 - not whether you'd buy a card based on a beta. Personally, I wouldn't buy a card based on a beta either but it wasn't the question. If I had a 7950 laying around, I'd want to try it.
Have a look here Netkas there are screenshots and comments that are actually relevant.