Get your taxes done using TurboTax

ACKMMH1 · ‎January 15, 2021

This is not due to Intuit. This is merely due to Apple. It is not a change. It is due to the fact that to develop new Mac software (and TurboTax each year is a new product) the Apple development tools (supplied by Apple) must be used. Apple only supports 3 years of OS, currently OSX 10.13, 10.14 and 10.15. There simply is no way for a software company to develop new software for any Mac OS prior to 10.13 using the current Apple tools. It is Apple that does not support OSX 10.12 or earlier, not TurboTax. For 2019, OSX 10.13 of later is required. Next year, 2020, Apple will drop support for OSX 10.13 so 10.14 or later will be required.

I have also found on https://www.discussions.apple.com this information in regards to MAC users

Try booting into Safe Mode (How to use safe mode on your Mac - Apple Support) by booting with the Shift key held down and check there to see if the problem persists. Reboot normally and test again. NOTE: Safe Mode boot can take up to 10 minutes as it's doing the following;
• Verifies your startup disk and attempts to repair directory issues, if needed
• Loads only required kernel extensions (prevents 3rd party kernel/extensions from loading)
• Prevents Startup Items and Login Items from opening automatically
• Disables user-installed fonts
• Deletes font caches, kernel cache, and other system cache files

Apple Support

How to use safe mode on your Mac

Safe mode can help you to determine whether an issue is caused by software that loads as your Mac starts up.