If your Mac does not meet the system requirements, and cannot be upgraded to a higher OS, then you can request a refund for the CD/download and use the online software. The license code cannot be used for the online software, which has a very different price structure.
https://ttlc.intuit.com/community/system-requirements/help/minimum-system-requirements-for-turbotax-...
To request a refund from TT ; https://support.turbotax.intuit.com/forms/refund-request.jsp
https://ttlc.intuit.com/turbotax-support/en-us/help-article/product-system-requirements/minimum-syst...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
