What I don’t comprehend is.................why would anyone buy security software for an Apple product, I mean we are told all the time that it’s bulletproof. I don’t mean to be snarky..............okay, maybe a little.
MacKeeper was targeted toward ex-Windows users and played on their Windows experiences and fears. It sold things like "Defragging" the Mac drives, "Optimizing" the file structure, etc., and other utilities that are already built into the Mac OS and are done automatically every time you save or install a new app for the first two, and are for the all of the rest that MacKeeper promised to do for them, which they sold by "ScareWare" are taken care of by OS X as part of its built in housekeeping merely by leaving your Mac turned on overnight. It really wasn't a good anti-virus either. . .
it sold itself by aggressive scareware pop-up ads claiming it had found PROBLEMS on the "Mark's Mac" and hinted at un-deleted files and problems akin to what a Windows' user would associate with a "Registry problem." Of course, the OS X Mac has no such animal as a "Registry" to have problems. But it scared them into thinking they had to buy it to "clean up their Mac" like they used to have to have utilities to clean up their Windows PCs.
I didn't think you were. . . It's a serious question. . . with a legitimate answer. MacKeeper was actually Malware, itself. It used social engineering to get itself on users computers by scaring them. It also offered "free" scans and once it was on your computer, it would then CHARGE you to fix what it claimed it found. . . and it always would find something. Such as it would recommend turning off Apple's Gatekeeper, saying MacKeeper could do a far better job of what Gatekeeper did. Not true. . . because by turning Gatekeeper off, everything could be downloaded onto the Mac. . . so that MacKeeper could poorly check it with an incomplete A/V library. . . or it would replace Apple's solid and safe UNIX utilities with its poor versions that were not automatic nor as complete.
Getting it out of your system was a real pain. . .
No system is bullet proof and only a fool would think so. The system itself is less susceptible. Biggest cause of most breaches is operator infection.