Mini Metro, the subway SIM created by Dinosaur Polo Club, is now available on the Mac App Store. It works with OS X 10.7 and higher and costs US$9.99.
In Mini Metro, players take on the task of designing the subway layout for a rapidly expanding city. Draw lines between stations and start your trains running. Keep your lines efficient by redrawing them as new stations open. Each station can only hold a handful of waiting commuters so your subway network will need to be well designed to avoid delays.
Your city starts with three stations. Draw routes between these stations to connect them with subway lines. Commuters travel along your lines to get around the city as fast as they can. Each station can only hold a handful of waiting commuters so your subway network will need to be well-designed to avoid delays.