The last two versions of this program have worked fine for me on an iMac using OS 9.2.2. I figured out how to use it intuitively which is always a big plus in my book. The multiple windows are unusual but I can deal with that, especially since it's a free program. The pricey Drumbeat program may have a nicer interface but I don't care about that as much as whether the program works well. I think I have my bases covered, for free, with this baby and iSwipe. Brownie points to the developer for dedication despite some rather mean early reviews.