Some reviews of MacKeeper include TopTenReviews' review of the software, an August 2013 article by Colt Agar on TheTechReviewer.com, and MacSecurity.net's review from 2014. MacKeeper is a controversial program whose generally positive press reviews belie widespread user dissatisfaction and a 2015 class action lawsuit for false advertising.
TopTenReviews.com, a professional review site, rated MacKeeper a 6.5 out of 10. The review made note of testing by AV-Comparatives in 2014 that found that MacKeeper's antivirus scanning ability was lackluster compared to many other products available on the market. More positively, the review praised MacKeeper's large suite of utilities and its customer support.
Colt Agar's review lists the software's lightweight and visually appealing nature as pluses but adds that it is mediocre at optimizing computers and the licenses to use the software are expensive.
The review at MacSecurity.net is positive, and describes the software as a "nearly perfect match" for the average user seeking protection and performance.
However, positive reviews are undercut by a 2015 class action settlement that resulted in an overwhelming number of former customers seeking refunds. MacKeeper is controversial because its aggressive advertising irritated and confused users, raising accusations that it was a scam.