Go to this TurboTax website for the 2015 desktop editions. Choose the edition and then select your operating system - https://turbotax.intuit.com/personal-taxes/past-years-products/2015/
Hey DoninGA
That link you supplied is for me to buy the 2015 software. I already paid for TurboTax when I filed my 2015 Tax Return. I need to Amend my 2015 Return, but I can't do that until I download the 2015 software for Mac.
There is no stand-alone amend software for Mac - only the full program which for obvious reason is not made available for anyone to download free of charge, but if you paid for the online version then you can request a download this way.
https://ttlc.intuit.com/questions/3449967-amend-prior-year-return-mac-software-request
Also, be aware that if your Mac OS is 10.13.4 or later there is a known crash issue with 2015.
TurboTax 2014 and 2015 crash on Mac 10.13.4 (and later).
That is a known issue that seems to have been created by Apple with a change in OSX 10.13.4. There was no problem with OSX 10.13.3.
Since this is not a defect in the TurboTax software, but is due to a change that Apple made which causes an internal Apple java script function to crash while reading an embedded java script component in the TurboTax application, TurboTax will not be issuing any update to the TurboTax software. ( An update would be useless anyway since the software must be running in order to apply an update and the software will not run at all.)
However, TurboTax has issued a workaround to remove the java script from the TurboTax application so that the Apple software will not crash.
https://ttlc.intuit.com/questions/4477509-turbotax-2014-and-2015-for-mac-crashes-on-launch
https://ttlc.intuit.com/replies/6960641
[UPDATE: as of May, 2019, TurboTax has dropped all support for the 2014 tax year. The "Secure Print Server" that was *required* to be able to print or make a PFD for 2014 ONLY no longer exists, so even you can get 2014 to run, it will be impossible to print anything]
Open up terminal and do the following and restart:
mv /Applications/TurboTax\ Premier\ 2015.app/Contents/Resources/Content/Assets/asset_service.js /Applications/TurboTax\ Premier\ 2015.app/Contents/Resources/Content/Assets/asset_service.js.bak
This seems to work for me at least.. all i needed to do was amend my return.