Unfortunately, Garmin doesn't provide a Mac version for the G1000 Trainer, so there's no official way for you to run it on your MacBook Air. However, you could try installing a Windows emulator like WineBottler or Boot Camp on your Apple device, then running the Windows version of Garmin G1000 Trainer with the help of that emulator. I can't guarantee that it will work, but it's definitely worth a shot.
