We are very proud and excited to release FlightGear 1.0.0 for Mac OS X. This release of FlightGear gives more "comfortable" flight to every single Intel Mac user as well as PowerPC user. Now it runs on both Mac OS 10.4(Tiger) and 10.5 (Leopard). FlightGear 1.0.0 for Mac OS X comes with the fancy GUI launcher that eases your flight. You can change aircraft, airport, and options as you like. The launcher also makes it possible to fly with your wing mates. Enabling multi-player mode pops up a fancy on-line map so you can find your new wing mates. Thanks to the easy installer in the launcher, you can add new aircraft and scenery data in a few second - no need to find the data folder any more.

You can download FlightGear-1.0.0 from Downloads page.

I've released the FlightGear Mac OS X 1.0.0-r150. This release fixes the problem in installing additional aircraft/scenery data. It is recommended for all users to update 1.0.0 (r149) to 1.0.0-r150. You can check your revision number by clicking "About FlightGear Mac OS X" from the menu bar of the GUI launcher.

If you don't want to download entire FlightGear package, you can also get a single fixed file and copy it to FlightGear folder yourself. see detail instruction at this page