https://community.avg.com/t/realtime-protection-has-crashed-since-updating-to-macos-sierra/258068
Realtime Protection has crashed since updating to macOS Sierra - AVG Protection - AVG Community
Sep 21, 2016 - Since updating to macOS Sierra, Realtime Protection on my Macbook Pro is not working. It states: 'Realtime Protection has crashed. Unknown error has...
realtime protectionmacos sierracrashedsince