I'm wondering if programs like CleanMyMac (http://macpaw.com/cleanmymac) really help making my machine faster... I tried the demo version and it doesn't look like it does anything useful to me (I can empty the trash myself and empty caches from my browser).
If anything, I'm afraid that programs like this has bugs that might cause system instability... I thought Mac/Linux does not need this kind of things, is that correct?