Did you buy the desktop software for Mac? See these installation instructions:
Drag it to the applications folder in the popup (the virtual drive window)--don't drag it to the Applications folder already on your computer.
FAQ: How to install TurboTax software for Mac
https://ttlc.intuit.com/community/installing/help/how-do-i-install-the-turbotax-software-for-mac/01/...
FAQ: TurboTax for Mac installation troubleshooter
https://ttlc.intuit.com/community/installing/help/turbotax-for-the-mac-installation-troubleshooter/0...
Also see:
FAQ: Minimum system requirements for TurboTax Mac software
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
If you can't get it installed, we can ask someone using a Mac to help you.
