External Link below and related to Statefull Firewall
Remove StatefulFirewall Adware (Virus Removal Guide)
McAfee Tech Support may have fixed it or may not have actually fixed it.
There are no known Windows-like Viruses in the wild that self replicate and affect macOS, because of the underling UNIX Foundation and Permission Limitation.
The Operating System resides in a Sealed and Read Only Volume that can not be opened by the User nor by Third Party Applications.
The only Entity that can open and modify or alter this Volume is Apple.
The Only thing this Antivirus software is protecting is the Bank Account of the Developers and for zero return to the User aside from the problems this software creates.
AntiVirus Developers purposefully Market their product to create a “ Fear Factor “. In so doing, creating a False Need for their Product.
Security. Built right in
Mac app security enhancements
The Built in Security is all that is required to protect the computer.
Any of the below should be removed as per Developers Instructions
McAfee,