I need the same answer but I using 10.11.6 and I need the Desktop version to file last year's return. I purchased the version thats available for past years and I am getting a message that states:
Oops, TurboTax can't start yet.
It looks like you need a later version of the Mac operating system to use TurboTax.
What you have: OS X 10.11.6
What you need: OS X 10.13
If it turns out you can't upgrade, we recommend using TurboTax Online.
Well TurboTax Online doesn't provide a version for the previous year.
I also reviewed the "System Requirements" and my computer met the requirements.
Im not sure what happened, but it doesn't allow me to install. Please advise.
