Well, in considering buying this (although I will try it first), I'm noticing that the OS dropdown selection stops at OS X 10.4. While the upfront information confirms that Silverfast is designed to work with 10.5, it always bothers me when the "order/purchase" pages don't agree with the "specs", but yet are specific about what OS version the software you are purchasing supports. Anyway, it has given me pause as I consider what software to use with my 9950F.