Q: Is MacKeeper a legitimate anti-virus application?

No, it isn't. Don't use it. If you need to use anything, use ClamXav.

(65476)

crapware

https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

See Beware MacKeeper! http://www.reedcorner.net/news.php/?p=245

STEER CLEAR OF MACKEEPER

See

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

This has been discussed many times in these forums

to unistall go here

http://applehelpwriter.wordpress.com/2011/09/21/how-to-uninstall-mackeeper-malwa re/

For a fee Home use antivirus try

sophos

http://www.sophos.com/en-us/products/free-tools/sophos-antivirus-for-mac-home-ed ition.aspx

MacKeeper is NOT a legitamate anything.

If you really, really need AV softwarealthough I don't know why, go with ClamXav. it is free and even more important it is safe. 

Neither of which can be said for MacKeeper.