FlightGear is an Open Source, cross-platform, flight simulator. The goal of the FlightGear project is to create a sophisticated flight-simulator framework for use in research or academic environments, for the development and pursuit of other interesting flight-simulation ideas, and as an end-user application.
The FlightGear base package includes only a few representative aircraft. Download more aircraft here.
Note: According to the developer's website, this game is comtatible with OS X 10.8 through 10.10. There is no information about newer macOS versions.
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