Read this article about 64bit OSX :
http://www.9to5mac.com/snow-leopard-64-bit-32-bit-firmware-efi
It's another reason why, people like me, with 32bit EFI, might as well wait.... or not buy at all. I took one for the team
64bit drivers [Kexts] will slowly be coming out and we get stuck with a 32bit OS, even though we have 64bit processors.
As far as I am concerned, especially with no OpenCL for my 3870, this is another nail in the Apple coffin for me.
I love the OS, I really really do, but the hardware is far too expensive [Mac Pros] and they knowingly cripple them by design. Not a conspiracy theory, read about the Mac Pro history and graphics cards, etc. Also, a current,
single CPU [Mac Pro] costs 300 bucks more than my
dual processor Xeon of '06. How does that make sense ?
So, I am going to hone my Hackintosh skills [Chameleon/PCEFI

] and see if Windows 7 sucks less than all other Microsoft offerings [I seriously doubt it will suck less but hey, I'm trying here].
Cheers !