Safari Version 10.1.1 MacOS Sierra 10.12.5 I may have ventured where the dark side lives with my Safari and while I KNOW Apple doesn't get viruses, I either got a virus or malware infection. As soon as I boot up Safair, I get popups saying I need to "Norton Up" or something. Then when I try to go to another website, I get the "do you really want to leave" popup. Very irritating to say the least. Any ideas as to how to get rid of this problem?