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Title: No software for MAC 9.1
Review: Nothing on Amazon's site gave system requirements of MAC 10 or later. My older Kensington Expert Mouse Pro after many years of hard use gave up the ghost, so I got the new one, it moves the curser sluggishly but all four buttons do the same thing, the scroll ring doesn't do any thing. The ball is smaller than the older one, I can't use my "8" ball. I have used a Kensington Expert Mouse for almost 20 years and have never had a complaint till now. I can get use to the sluggish and smaller ball, but I wish the software were compatible.
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