You'd have to contact Feral Interactive to see if they have ported the modding tools as well as the game. I have no idea about the underlying directories BW2 uses on the mac version, whether or not they used deep unix directories in which case Finder may be hiding them from you.
Search for any program data regarding BW2 or Lionhead, and poke around inside it. I imagine it used relative file paths that won't have been modified when the game was ported, so once you find the relevent location, it should be identical to the windows version.
Large Hadron Collider - because fleshlites are for wusses