I have a Mac only, so I am not able to get Terraria through Steam. I was wondering if I can play Terraria on my iPad Mini with a friend who has it on his PC. I was wondering this, because I saw that Deepworld on iOS is compatible with the Mac version.
The mobile and PC versions of Terraria have different content and are not compatible with each other. This might change in the future, but it seems unlikely at the time.