Be sure that you only check those you truly want to remove, since CleanMyMac 3 does a thorough job and might remove user documents stored in folders that belong to any application you decide to purge. As this YouTube video shows, the software will give you an estimate of how much space it will free before you approve the changes: This replaced iPhoto in OS X MacPaw claims that the software got an update, but it seems like some users are still having problems. You can manually remove the files if you find yourself in this situation. You can avoid this kind of an issue if you make sure not to enable any of the cleanup options related to this kind of software. Disable Dangerous Options Make sure not to enable things like application localization removal if you need to work with your software in other languages.
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CleanMyMac 3: The Best Way to Clean, Maintain, and Optimize Your Mac.