Despite mixed initial reviews for the game due to always online game requirements and the omission of features which you would expect from any SimCity game, Maxis and Electronic Arts have powered forward a series of free updates to the game, the most recent of which has focused on improving transport mechanics.
After a several month wait, SimCity has today been released on the Mac platform for the very first time via Origin and other digital retailers.
My review of the game can be found HERE.