Steam Train for Mac

From Nostalgic Software:

You represent the engineer and crew of an 1800s era steam train. Your vintage train consists of a steam locomotive and tender, plus baggage cars and passenger coaches. Your train will travel between stops, up and down grades, negotiate curves, switch tracks, and couple/uncouple cars. Controls include the engines throttle, boiler steam pressure, traction sand, three brake types, manual couplers, and track switches. Share right-of-way with the Express. The Dispatcher gives train assignments.