Hi, I have the Logitech MX510 wired USB mouse and it works perfectly(or as intended) on all the Windows 7/Dell machines I have hooked up to a Dell 24" machine. Movement of the mouse pointer is smooth and stops on a dime/pixel. I noticed that the performance of the MX510 is herky-jerky plugged into the MB PRO 2010(late model) 13" running OSX 10.6.6. I have sensitivity to max but it seems like i need to keep moving the mouse twice to get to a destination because it stalls half way. Seems sluggish and imprecise. Are mac mouses better with MBP? The MBP touchpad seems to be the most responsive way to navigate the mouse pointer on the MBP running OSX 10.6.6. Do you have the same problem? The MBP touchpad also seems imprecise running Windows 7 in Bootcamp. Thanks.