Problem After upgrading to or installing Mac OS X Lion, you notice that the mouse scrolls in the opposite or reverse way in which you are used to. Solution To change the setting for the Trackpad: Click the Apple icon in the top left. Click System Preferences. Click the TrackPad icon. Click the Scroll &… Continue reading Scrolling settings in Mac OS X Lion
If you are having problems using the official Mac mouse (e.g. sticking, unresponsive) then try cleaning it by turning it upside down and moving the mouse in a circular motion by pushing down on the ball. Official Apple Guidelines Official Apple Video Tutorial Use QuickTime or VLC player to play the video.