AileenMThey are two different versions with different coding so I'm sure you'd have to buy both. You could contact the company directly via their website.
jacautI was a bit oblivious. If you look at the top of the box it says Windows and Mac OS. So should be able to do both, depending on the number of times it allows you to download the program. It used to have a limitation of 3 or 5 (can't quite remember). Sorry for my mistake. Hope you pick it up the next time it drops!