Using the TurboTax website for purchasing the current tax year desktop CD/Download editions you will be given the option to either receive the software as a Download or a CD. After you select the edition you want to purchase a pop-up window will open where you can select either a Windows or Mac operating system for a download or click on the blue link within the window I'd like to order a CD. The CD includes installation files for both Windows and Mac.
Go to this website to pre-order the 2017 desktop editions - https://turbotax.intuit.com/personal-taxes/cd-download/
Note - The software will be available in mid-November. TurboTax will send you an email when the product has shipped or the Download is in your account.