What do some of the options do in Graphics Config?

[Shonumi]

You'll probably have a better experience using Dolphin on Windows or Linux. Both have less issues with the emulator than OS X. Direct3D9 will probably be faster than OpenGL in OS X for a lot of games. OpenGL in Linux might be faster than in OS X due to better drivers. There's no helping weak hardware though, so games like TP aren't going to run fullspeed all the time regardless of what OS you're using.