Also, don't use their uninstaller. I've heard it leaves some bad stuff behind.
Do it this way and you can read more about it.
That site may well be going offline soon.
Since I posted that procedure in September the site has come under increasing attacks from unknown parties. Initially, MacKeeper (or rather Zeobit, MacKeeper's developers) threatened me with legal action. When I pointed out their legal threats had no teeth, they then offered to hire me...
In November of last year someone (not me) registered 'applehelpwriter' under a .net domain, but hid their identity on Whois by using a protected name service. They then illegally mirrored my site, removing my name and the post to MacKeeper...
This week, I managed to get that illegal mirror taken down through official channels. Coincidentally, this week my own service provider has contacted me to say that my site is associated with a spamming scam (I have never been involved in spamming, and indeed doing so would be detrimental to my reputation. I don't sell anything, only my services as a tech writer to developers, which is such a limited market that spamming would be counterproductive).
Today, it seems my service provider has locked me out of my site because someone has reported my site as containing unacceptable content. Given that my site is nothing other than fairly basic user tips for OS X, it is hard to imagine what that could be...(I'm still waiting for a reply from my service provider to see what, exactly, the complaint is).
Am I being paranoid in thinking this could have something to do with MacKeeper and Zeobit??? Oh, probably...
The procedure I wrote for uninstalling MacKeeper can be found via downloadable pdf here, if you should need it:
Zeobit also tried to pay me for a "review" after the review I posted on my blog. I never saw the other things in my case, but they've pulled a similar stunt in other cases. My blog documented how they bought the clamxav.org domain, and used it to host a fake review of ClamXav (properly found at clamxav.com). At one time, that site was registered to Zeobit, but it is now "owned" by a domain name anonymizing service (WhoisGuard). (I note that it has been redesigned since the last time I was there, and I cannot think of any ethical reason that they would be maintaining, much less updating, this site!)
You and I have had our differences here on occasion, but the old saying "the enemy of my enemy is my friend" applies. If you need help dealing with the Zeobit menace, let us know here. There are many who will help.
Thank you Thomas. I had indeed thought earlier about contacting you privately to get your thoughts on this matter, but was unsure how you'd react given our at times less-than-cordial past. I am grateful for your support.
Despite our differences of opinion on some matters, I recognize we share a common interest and a common aim (supporting other users) even if we sometimes disagree about how that aim is best achieved.
In that regard, we are far closer to each other than to Zeobit. I'll be in touch if needs be.
I've been using Mackeeper for four years and I've found it very useful. Some of the comments above must relate to user errors because I have never had trouble (and I am no geek, being 80 years old). Contrary to opinion expressed above I have used its uninstall program many times and found it removes unwanted applications cleanly and with no residue. When I had to query some matter, I have always had a good response. I used CleanMyMac before this and it was efficient but restricted in what it could do compared to Mackeeper. I was annoyed with CleanMyMac because when I updated it my old registration number would never work.
I don't doubt that MK has some satisfied customers. If it didn't, it would have died a death by now.
That doesn't change the fact that literally thousands of people have bad experiences with it. My 'uninstall mackeeper' page gets 3-4,000 hits a week, and the pdf version has been downloaded over 2000 times in less than 6 months.
The huge number of problems caused by this application cannot simply be put down to user error, or if they can, then the problem is in the way the app is designed. No app should be that easy to use incorrectly so often, and with such devastating consequences.
I downloaded Mackeeper. It deleted my Final Cut Pro 6 files so I could not use FCP at that point. I was using Lion at that point so I could not reinstall FCP 6. I got lucky and was able to obtain FCP 7 and it installed ok. Never asked for my money back, just will never use that company for anything again.
I have to say that soon after I wrote my response to criticism of MacKeeper, I too ran into problems. I forget now exactly what it was now, but possible influenced by what I had read earlier about MacKeeper, I decided to delete it and had no difficulty doing so thanks to instructions from other correspondents. I don't know what has happened to MacKeeper but it no longer performs as well as it did originally. I find AppCleaner does a resonable job of cleaning up and it's free.
You don't need any antivirus or "clean up" software on a Mac. I think all of these anti-MacKeeper posts only serve to promote other vendors' antivirus or "clean up" software. Get rid of all of it. There is no more stable and high performance configuration than the one Apple gives you out of the box. The more you mess with that, the more crashes you will see and the slower things will run.