Ok I noticed that the mac nvidia drivers have had the chain link fence texture fixed. Although there are a three more textures that I noticed that don't work.
In Counter-Strike Source de_port, there you can see that railings don't show up all the time, then the road guards don't render correctly.
In Episode One on the mission 'low life' the cage doors that you have to use the crank to open, don't render as well.
I just thought that the solution could be solved if the chain linked fence could be fixed.
Also Episode Two and Portal won't save my video settings when I exit, it just starts up in 1024x768 with the recommended advanced settings. Team Fortress Two isn't affected by it either. I was wondering if there was a way to fix that, it's a simply problem.
Also portal and Ep2 require -dxlevel 80 in the startup options to work, but that was mentioned in another forum. Other then that I haven't seen any problems, although I expect I might find more texture problems since I haven't played through all of Half-Life 2 in Crossover Games.