@sfsprock The downloads are specific to only one operating system. If you happen to have the actual CD and computers that have disk drives, the CD will install on either OS. If you do not have a disk drive then contact customer support to request a download for the other OS.
To call TurboTax customer support
https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number
Customer support is available from 5 a.m. to 5 p.m. Pacific time Monday-Friday.
**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.**
