Apple does not support OS prior to 10.14 and TurboTax will not support any OS not supported by the manufacture. As of January 2021 Apple dropped support for 10.13. They also dropped support for Windows 7 because Microsoft dropped support.
That has been a TurboTax policy for years.
Some vendors will compile 2 or more versions of the software for different OS's, but usually they only have one product. TurboTax has 4 different Mac versions and so far has issued 20 updates for each. They simply do not feel that it would be cost effective to maintain separate versions for unsupported OS's.
Sorry, but that has been TurboTax policy for years.
**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.**
