Hello from Washington State

[draver]

But I don’t have a Windows PC!! And you can’t download it on OS X. Unfortunately I just bought a iMac and it doesn’t work for OS X, yet.

You don't need a desktop to use the Sim portion of your equipment. Just start your Controller, drone (minus the props!) then connect your phone or tablet. The opening screen to the DJIGo4 app has 3 little bars in the upper right corner of the splash screen. Tap that, and then the Academy option. You'll see the flight simulation that you control with your device inputs. Kinda boring after a while, but you can test different control variations and fine tune your preferences.