Check out the program Infinality. It has settings for different rendering methods including one that mimics OSX. It works great for me although I will admit that I am not one who notices this stuff easily.
Apparently Infinality has been abandoned, and can cause problems, so might want to be careful installing it. I recently had an issue where I could not log into Gnome, I took it as an opportunity to reinstall Arch as I wanted to do a fresh install anyway, but have since found out (from the podcast Linux Action Show) that the issue was very likely due to Infinality. Just a heads up.