Have you recently felt a little bit sluggish in your Mac Device? You may notice that slowness by doing simple tasks. Like a search through Spotlight. Or opening a file by another program "Open With" and stuck with that little process "fetching..." for long time. Or you notice a slow time on opening apps more than what you experienced before when your mac was fresh. All of this slowness problems are produced due to the accumulation of junk in your system! Therefore It is necessary to clean up your Mac OS from time to time. Here are some tips & free apps to keeps your Mac clean & fast.