What Is Search.desktopactivity.com?
If your browser redirects you first to search.desktopactivity.com and then to search.yahoo.com when you enter search queries into the address bar, you probably have a browser hijacker installed on your Mac. Browser hijackers usually come in the form of browser extensions/add-ons. They can get installed on your Macbook along with a free app or with a fake software update (when you get redirected to a page warning you that your Flash Player or your browser is out of date and providing you with a link to download a new version; that’s not true: most browsers nowadays update automatically, while Flash Player will stop being supported very soon, and most websites don’t use it anymore). A browser hijacker can change default search engine, homepage and some other browser settings to redirect users to search engines they promote and consequently increase ad revenue for those. You may follow this step-by-step guide to uninstall the browser hijacker and remove search.desktopactivity.com from your Macbook.