What are you talking about? You can use the online software with any computer or mobile device that has internet access. You can use the CD/download with any Mac that meets the system requirements. You just have to specify that you need the Mac version when you purchase the download.
CD/DOWNLOAD (This requires a full PC or Mac—-cannot be used on a mobile device)
https://turbotax.intuit.com/personal-taxes/cd-download/
You can also purchase the CD/download from various retailers such as Costco, Amazon, Walmart, Best Buy, Staples, Sam’s Club, etc. etc. etc.
This link Where can I obtain authentic TurboTax software? has a list of authorized TurboTax resellers.
When you use desktop software, there is an additional fee to e-file a state return. You can avoid that fee if you print, sign and mail the state return. The state e-file fee is $20 and increases to $25 in March.