Is there any chance you're actually thinking about Mackeeper? I've seen those two confused before.
MacKeeper is indeed shady, but I think Clean My Mac is a great piece of software.
MacKeeper is indeed shady, but I think Clean My Mac is a great piece of software.
I could swear I've seen those "Your Mac is having a problem" ads that fake being a system error trying to get me into Clean My Mac 3, but may be it was MacKeeper.