What Mac OS X supports its their business and none of ours. We want the latest and greatest.
Companies targeting Linux will mostly also have a Mac port in place.
AFAIK Apple still only provides OpenGL functionality up to version 3.2.
This will probably represent the boundary condition by means of a
common denominator for the supported OpenGL version.
That's why I said OpenGL 4.x won't be required IMHO and focus is more
on speed and compliance.
Not to mention I'm getting nasty lockup in this binary crap once a week or two. With a very interesting trace showing fglrx has caused OS to die by horrible death.
For some reason opensource driver is far more stable and could easily last for month or two of uptime without any nasty surprises.
P.S. looks like if Intel does a great job and it's a really cool idea for them to communicate with Valve to make a decent 3D engines to run nice on their hardware out of the box. As for me AMD could learn from this as well. Else it would be more than funny if powerful 3D engine would work better on weaker GPUs due to better drivers