The Mac tries to use the latest version for the software. Open the TurboTax 2016.app, then use File -> Open Tax Return. Locate the xxx.tax2016 data file that you want to open. That is a function of the Mac OS, not TurboTax.
(You can select the xxx.tax2016 data file and do a File -> Get Info. The "Open with" should show TurboTax 2016.app, but I think the Mac OS 10.12 ignores that if there is a later version of the application.)
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
