[Kovah]

No. Because I don't have problems with full hard drives. If I have full hard drives it's because of files that I really know about (like movies or backups).

Besides of this I would really want to know how the app should decide which are unnecessary files?

PS: I think there are more useful ideas for new software instead of a new version of CCleaner for Mac. Just search the App Store for useful apps that are horrible designed and try to make them better.