Dude, ive been lookin for the drum blueprint prog for my mac too.
You might just have to run Parallels, a program where you can windows or linux alongside the mac os. I've used to play pc games before, but on this one i don't have it yet.
I use the free DW Kitbuilder, on their website, it's flash-based and really easy. You can use Grab (the mac program) to take screenshots and save them.