OpenTTD (64-bit for Windows Vista/7/8/10)
Our website provides a free download of OpenTTD (64-bit for Windows Vista/7/8/10) 1.7 for Mac. The actual developer of this free software for Mac is OpenTTD Group.
From the developer:
OpenTTD is an open source simulation game based upon the popular Microprose game "Transport Tycoon Deluxe", written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features. As president of a start-up transportation company in 1950, you have a choice of building rail, road, air and maritime transportation routes to build up your transportation empire.
You may want to check out more software for Mac, such as Finder Window Manager, Window Tiles or Window Magnet, which might be similar to OpenTTD (64-bit for Windows Vista/7/8/10).