CCleaner for Mac is a free system useless files cleaner, system optimizer and privacy protector specially designed and developed for Mac users. Especially, it is fairly stable and safe to use, even the novice computer user won’t encounter a problem due to misuse. CCleaner is free, small, has multi-language interface, and runs fast. When it comes to system junk files cleaning software on Windows, many users will recommend Piriform’s CCleaner first – which has almost become one of must-have tools for any computer.