content: While this is a great device, and probably the only one of its kind in the marketplace, if you run Mac OSX Mountain Lion I would avoid it. The software will not run on startup and that forces you to go into the System Preferences and start it EVERY TIME you start the computer. Without the driver running you are stuck with a device that is little better than a Magic Mouse. This is absurd and has been going on for YEARS, with no update in sight.