For example, if you have multiple computers and you want to use Family Tree on all of them? You need to buy the Family pack to use the license on up to three devices. We use the Family Tree Maker on one Windows laptop and on MacBook Pro or iMac. Using Family Tree Maker on other devices requires the license for that device. And getting multiple licenses is not at all expensive. By buying the economical Family Pack, you get 3 Computer License of Family Tree Maker. In addition, it costs $20 to buy a family pack.