TurboTax Deluxe 2017 cannot be opened because of a problem. Check with the developer to make sure TurboTax Deluxe works with this version of OS X."

cyanocitta0crist · ‎June 4, 2019

Have OS X Yosemite 10.10.5, Firefox Quantum, Safari 10.1.2. Downloaded TurboTax 2017 twice, same result, cannot be opened.