Since Apple will no longer provide support for Mojave 10.14 as of November 2021, you’ll need a newer operating system to use our latest desktop products. For tax year 2021, TurboTax CD/Download requires Catalina 10.15 or higher to install.
You can continue using TurboTax CD/Download for previous years on Mojave 10.14 but you’ll need to update your Mac before installing any desktop products for tax year 2021. Older versions of TurboTax are also compatible with Catalina 10.15 and higher.
If you use TurboTax Online, there’s no impact to you as long as you meet the minimum system requirements.