Your account on TurboTax should work well on all devices and software. Why is TurboTax not working on Mac? There are chances that you might be running the program from a mounted virtual drive or CD; please prefer to do it from the application folder. Wired broadband connections are recommended to avoid problems with a wireless connection. You can try to empty the trash at once. You can force the update to download and install. If this does not work for you, turn off your computer, and then your router, and in the last your modem. The issue gets fixed this way.