I have a message on my home screen announcing that my MAC has been infected by a Zeus virus and I need to call an 800 # immediately
What’s going on? Am I infected?
MacBook
All such messages are scams. Close the offending page, and avoid sites that are involved in such bogus advertising tactics.
Avoid phishing emails, fake 'virus' alerts, phony support calls, and other scams - Apple Support
Phony "tech support" / "ranso… - Apple Community
