Once you place an order for the Family Tree Maker 2019, you get the download link on the screen. You will find two links, one for Windows and the other for the Mac operating system. You can choose to click on the download link according to what your computer operating system is. You can also use FTM 2019 on a new computer easily. For this, you need to purchase FTM 2019 Family Pack, if you use this on multiple computers.