I had a popup appear when i was on Safari telling me there might be a phishing website ahead and that the security of my computer was compromised. At the same time, there was an audio file playing which said the same thing. The website of the popup was www.macyreport, and i was encouraged to phone 647-360-4456 which i did not do.
[***] scam. Say they are in Talahasse Florida. Just force quit or unplug your internet. If this doesn't work, pull the plug on your machine as a last resort.