Is MacKeeper safe

No, the opposite.

http://www.reedcorner.net/beware-mackeeper/

https://malwarebytes.com/antimalware/mac/ - general Malware removal tool. The free version is suitable for single incident removal.

http://applehelpwriter.com/2011/09/21/how-to-uninstall-mackeeper-malware/

ASC user tip on Mackeeper by Klaus1 - https://discussions.apple.com/docs/DOC-3022 = https://discussions.apple.com/docs/DOC-6221 = https://discussions.apple.com/docs/DOC-3691

MacKeeper – Do Not Install

MacKeeper – Do Not Install (2) See SDW2001’s post

NevadaBill: Just so you're aware, the first link in what you deemed the solution goes to the very same document I linked in my post -- It's the document that seems to have 4+ copies in the help docs area of this site.

Eric Root wrote:

See SDW2001’s post

Edit: Uh, don't click on the link in brown or you will get totally misled, just click on the one in blue.