Read the sticky I made, it has all of the most popular and widely used bots out, there aren't very many.
As far as I know all major bots work on Mac (maybe not natively , meaning you might need to get a program called WINE to get them working) but overall all major bots do work on mac with a bit of simple elbow grease of tweaking.
Check out the sticky I made, visit each site, and search there for a thread/tutorial on how to get them working on mac.