WWT only runs on a Windows Operating System. You can still run WWT on a Mac computer, but you'll have to somehow get Windows to run on your machine. There are a couple of ways to do this. You can Bootcamp your Mac or get a virtual computer program like VMWare Fusion or Parallels. On this page, we'll give you some instructions, tips, tricks, and advice for these methods.
Before you do anything, PLEASE BACKUP YOUR COMPUTER. We've never run into a problem with this process, but we'd hate to have something happen to your data....
Read more about Installing Windows OS on a Mac