Q. How do I remove MacKeeper antivirus/utility for Mac?

MacKeeper (also known as 911 Bundle) is a program for Macintosh OSX from the company ZeoBIT that purports to protect your Mac from viruses and do other utility functions.  It is heavily advertised with pop up Web ads and banners, and many people have reported associated “shill” websites that are promoting it with phony positive reviews and have reported stealth MacKeeper sales people posting positive info to forums. Part of the problem seems to stem from the sales model, where a variety of companies/websites other than the publisher are selling it under commission but without any control from the publisher.

My advice is to not install this product, even the free trial version.  My opinion is that it is designed to extract $39.99 from unwary Mac owners to fix non-existent problems, and it is difficult to remove the software once it is installed. There are many online reports of the program reporting false errors and viruses (to scare you into buying it), compromising machine performance, and even deleting data files.  Since most of what the program is sold to do can be done with the operating system tools, or with free (and reputable and reliable) utilities, I can see no reason to recommend the program.

• If you have already installed the MacKeeper trial application, do not use the MacKeeper uninstaller provided by the publisher Zeobit.  (It leaves software on your machine – I will leave up to you to decide what that implies)
• Do not use the MacKeeper encryption feature to encrypt your data.  If you have done, remember to decrypt the data before removing MacKeeper or the data will be lost.

First, download the free utility EasyFind (or use your favorite file finding utility) search in all folders, for any file with Zeobit or MacKeeper and delete them.

Detailed instructions for removal

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

Or download a PDF document with instructions for removal  http://cl.ly/1R2r191D0W2G2s3U1O02

If you have problems uninstalling the program, try restarting the Mac in Safe mode (hold the Shift key down through boot up) first:  http://support.apple.com/kb/HT1455

If you keep getting popup ads for MacKeeper, these may be related to website(s) that you are visiting. Banner ads for MacKeeper have been reported to spawn popups. I recommend turning on the popup blocking features of your web browser, or switch to using Firefox with NoScript installed.
Block pop-ups in Safari  FireFox  Chrome

There are free antivirus programs for Mac if you want to guard against the possibility of a Mac virus, or passing on a Windows virus.

Sophos Antivirus for Mac Home Edition 
ClamXAV Open source anti virus

Paid Mac OSX antivirus options:

ESET Cybersecurity for Mac
Intego VirusBarrier
Kapersky Anti Virus for Mac
Symantec Norton Antivirus for Mac

More opinions on MacKeeper

https://discussions.apple.com/thread/2786697?start=0&tstart=0

http://themacfeed.com/2011/06/17/mackeeper-a-rather-slimy-tale/

https://discussions.apple.com/thread/2779849?start=0&tstart=0