What Is Common Operation?
Common Operation is a browser add-on (extension) that may appear on a browser after a user installs a cracked program or opens a file downloaded from an untrustworthy source. Common Operation sets the default search engine on browsers to a fake search engine which redirects all searches to Yahoo. Extensions that alter the search engine or homepage on browsers are called browser hijackers. You may follow this step-by-step guide to remove Common Operation hijacker from your Mac and restore your favorite search engine.