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Title: Pretty good on OS X
Review: Although there's no documentation about OS X, it's simple to set this thing up (in 10.3.3): just open the Keyboard & Mouse preferences, choose Bluetooth, and click "Set up new device..." and push the connect button on the bottom of the mouse.And while there's no OS X support for the third (thumb) button, you're still a right-click and a scroll wheel ahead of Apple's own Bluetooth mouse offering... for less money.
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