We don't make a native Mac version of TurboTax. To use TurboTax on your Mac, you'll need to switch to one of our online editions. But good news, you can transfer your prior year returns prepared in the Windows version into your current year TurboTax online return. You'll just need to find those files on your Windows computer (the *.TT16 files) and copy them somewhere on your Mac. Then, when TurboTax online asks you if you want to transfer from a prior year, browse to those *.TT16 files to import them.