@IF your Mac does not meet the requirements for the 2019 TurboTax software, you can use the TurboTax online editions - https://turbotax.intuit.com/personal-taxes/online/
To which I reply:
This is not correct. The TurboTax website states the minimum requirements for operating system and browser required. Those specifications are the same as the requirements for the TurboTax software. Please refer to your own resources to verify this. Thank you.
Please pass-on to TurboTax that as a result of their decision to toss customers to the curb over trivial issues like computer and browser, I prepared my taxes using a different service. It took me 20 minutes and the return was filed and acknowledged by the IRS in less than an hour. It cost me $0 to do this using another service. TurboTax has been my "go-to" for years and now that relationship is concluded... over the trivial issue of computer operating system and Internet browser. You guys need to re-evaluate your priorities if you want to stay in business.