Get your taxes done using TurboTax

Why does Turbo Tax keep requiring new version of Mac O/S every year. I am wondering whether Intuit is getting kickback from Apple company.

My laptop has Mac O/S Siera 10.12.6. . Now TT 2019 says minimum requirement is Mac O/S high Sierra 13.

What is my option to use Turbo Tax 2019 preparation