- Update the mac operating system to the latest version... check for updatesnot sure as to what difference this makes but when I played the DVD on my mac I had the latest os x updae installed

- Bootcamp (do not really recommend) not sure as to what difference this makes but when I played the DVD on my mac I had used boot camp to partition my drive and install windows on the partitioned drive. you need a legit copy of windows to do this and to go through a fairly lengthy re install and set up process

I have discussed it with tim i might have a different dvd reader then he does and that could be the reason why it works in mine and not his