HT1338: OS X: Updating OS X and Mac App Store appsLearn about OS X: Updating OS X and Mac App Store apps
Currently Being ModeratedFeb 10, 2013 7:12 AM (in response to beasmom)
Welcome to the Apple Support Communities
MacKeeper is an app that "cleans so well". It can damage OS X and you mustn't install it > https://discussions.apple.com/docs/DOC-3036
Currently Being ModeratedFeb 10, 2013 7:20 AM (in response to beasmom)
No. It is not on the level. MacKeeper is scamware and should be avoided. It does nothing that can't be done for free plus it can totally destrory the operating system on your Mac.