System Infected: Rovnix Bootkit Activity

I see the message below when when viewing my History: Vulnerability Protection in Norton Antivirus for Mac Version 12.7 (57)

System Infected: Rovnix Bootkit Activity - This is showing as an outgoing connection which leads me to think that my system is infected.

Ironically, the IP of the Remote System is a Google IP address - see attachment.

 

Am I infected? How can I verify this? I did a full scan, and it came up clean. Did searches, but all I could find was information on Windows infections.

Please advise, as this is one message that has me worried. Thanks!