Trainz Simulator for Mac is now available as a digital download from the Macgamestore (http://www.macgamestore.com). It costs US$49.95 and requires Mac OS X 0.5 or later.
Here’s how the game is described: “Trainz Simulator for Mac includes everything you need to build and operate your own dream railroad. You can build a fun layout in minutes, faithfully recreate a steam railroad from days gone by or develop a fully fledged 100 mile prototypical route; the choice is yours. All three models of Trainz, Driver, Surveyor and Railyard, is included with this release.”