Remove MacCost ads (Mac Cost popup) on Mac OS XAnticipations about the browser plugin application called MacCost and the actual state of things do not match. It claims to enhance one’s eshopping activity by providing up-to-date information on discounts and freebies, but ends up flooding web pages with junk ads that hinder the normal browsing experience. This tutorial is aimed at describing this adware from a security stance and instructs affected Mac users in removing the bug.
Source:
Remove MacCost ads (Mac Cost popup) on Mac OS X
