I am trying to use an optical wired mouse after I realised that the button of my trackpad is going to be worn out fast, as I can feel something under there that is going to break. I can hear two noises when I click the button. Not sure whether you guys can feel the same thing. Anyway, I'm starting to use a mouse now but somehow it feels really weird. At first I thought it's being slow after maxing out the mouse speed. Then I installed MZOOM to make it faster. But the weird thing is when I move mouse for just a bit, the cursor seems to very slow, like it's not sensitive. And I have used a lot of patience to bring it somewhere that I want to click. I can move the mouse everywhere on the screen quite fast but when I want to click or move it to a specific point, I need to put my cursor somewhere around the point and slowly move it to the exact point. It's just feel weird. I don't have that kind of problem in my bootcamp Windows Vista. I have adjusted the speed of the mouse but it feels the same. Anyone has any ideas? Thank you in advance!