I use Clean My Mac, mostly for the privacy aspect of removing usage history/etc. It's not strictly necessary (just like CCleaner on Windows is not - your PC won

I use Clean My Mac, mostly for the privacy aspect of removing usage history/etc. It's not strictly necessary (just like CCleaner on Windows is not - your PC won't explode if you don't CClean for years) but could help giving you back a few gigabytes of cache/temp files.