2018 Requires 10.12 or higher.
2019 will require 10.13 or higher.
(TurboTax supports the Mac versions that Apple supports with the Apple developer tools and Apple will drop 10.13 from the tools before the 2019 version is released.)
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
