CCleaner has the dual purpose of making your machine leaner and faster but also reducing clutter in ways that would takes hours, if not days, to do manually and with the need for a lot of research to properly identify files and their purpose before deleting.ĬCleaner has a lot of Windows experience with this kind of work, and Piriform developers have decided to bring this technology to the Mac because although OS X is a usually very tidy operating system, it still generates a lot of junk if you don’t keep an eye on it.