Game has unplayable frame rates!

[AaronKOG]

This is odd, I have a Mac Mini with AMD 6630M 256MB and was able to play through that section (on low texture and screen resolution). Lets get more detailed information about your system. You can get this via Steam->Help->System Information. I also want to confirm that you tried tweaking Texture Quality. That seemed to be a major contributor to performance for me at least.