Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Why do you want to reinstall it ?


Because the trackpad pointer was laggy although I had reset safari.

When I open safari and chrome, the chrome trackpad pointer also laggy but it became normal after I closed safari.
 
You haven't been able to remove and re-install Apple application in the traditional way for a while. Which is stupid given how buggy they are.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.