I/ve never seen that funnny banded ring efffect n the Mac Civ 3 I've played. However, all the screenshots from the site are from the PC ver5sion. Perhaps it's different.
I believe that PTW players can play against any platform opponent. It would be silly to make a Mac version if there are only a couple thousand of Mac Civ III players, unable to play the tens of thousands of PC players.
I wish thatr the endgames were more realistic.
And that the AI could play me honestly, without cheating.