Here are the steps from TurboTax's FAQ on how to transfer last year's TurboTax Windows return into TurboTax for Mac
1.On your Windows computer, find last year's tax file and copy it to a removable device like a thumb drive or flash drive.
2.On your Mac, copy the tax file from the flash drive to your desktop.
3.Open TurboTax for Mac and choose File > New Tax Return.
4.TurboTax will search for 2013 tax return files on your computer and should find it. If not, click the Find your tax return link, browse to your desktop, and select the file.
5.Wait for TurboTax to finish transferring the information over.
