Catalina - Disable Internet Sharing

Information

If the system does not require Internet sharing, support for it is non-essential and _MUST_ be disabled.

The information system _MUST_ be configured to provide only essential capabilities. Disabling Internet sharing helps prevent the unauthorized connection of devices, unauthorized transfer of information, and unauthorized tunneling.

Solution

This is implemented by a Configuration Profile.

mobileconfig profile info:

com.apple.MCX:
forceInternetSharingOff:
True

See Also

https://github.com/usnistgov/macos_security