Voted Best Answer
Jan 07, 2016 - 06:23 PM
The App store edition of Trainz Simulator Mac does not include nor require a serial number. Instead, registration is achieved by simply entering your Planet Auran account's username and password into the settings in Trainz. When Trainz logs in, it will automatically register itself in your account, and you will then have access to the Download Station and other online features in Trainz.