Weknow.ac is a browser hijacker, that was created to sneak into user’s Mac and hijack all the browsers in order to generate revenue from traffic and advertisement. Commonly this malware can’t be removed manually, because the infection goes deeply into your system. Weknow.ac will change your homepage and search engine without any permission. You may also be redirected to some unsafe website, that can affect your system and browser in a malicious way. In this article you may learn how to remove Weknow.ac redirect.