macbook不能start flight

卡在start flight
Starting fgfs.sh with --enable-hud-3d --aircraft=777-200ER --browser-app=open --disable-terrasync --prop:/sim/rendering/multi-sample-buffers=true --prop:/sim/rendering/multi-samples=3 --enable-fullscreen --disable-texturesshell: current dir: /Users/chuck/Desktop/FlightGear.app/Contents/Resources
/Users/chuck/Desktop/FlightGear.app/Contents/Resources/FlightGearController.rb:47:in `initialize': Ruby threads cannot be used in RubyCocoa without patches to the Ruby interpreter
Exiting fgfs.sh