One of the most often use app – Finder and yet it is kind of sluggish after using some time.
1. Disable standard Finder animations.
defaults write com.apple.finder DisableAllAnimations -bool true
2. Disable ‘snap to grid’.
defaults Write com.apple.Finder AnimateSnapToGrid -bool FALSE
3. Disable Info pane animations
defaults write com.apple.finder AnimateInfoPanes -bool false
4. Disable slow-mo animations (seen when you press Shift during Exposé launches or window minimization)
defaults write com.apple.finder FXEnableSlowAnimation -bool true
Issue any or all of these at the command line, and then restart Finder.