OS: >= OSX 10.4
Universal binary will be available sometime in 2006
Recommended: >= 1.33 GHz processor with >= 768 MB RAM
Minimum: If you have a USB midi interface and some hardware synths you might get by with a 500MHz, 256MB machine. Much of the development was done on just such a machine.
As with all audio applications the more speed and memory the better. If you are uncertain if your machine will work, you can try the
demo version.