I started getting an error message from my Sophos virus protection app. early last week: “Please contact your system administrator. Your Mac is running with non-standard permissions on key directories and your Mac may be insecure.”
I’ve run 2 Onyx scans to fix permissions and perform other maintenance, and it still comes up every time my old MacBookPro restarts. Sophos’ support website (entry #131959) suggests a complex Terminal-based fix that I’m not comfortable trying. I’m running Sierra (macOS 10.12.6) on a 2012-vintage MBP (with an added SSD drive) that otherwise runs fine. Any suggestions?