Hello macOS users: It seems to me that Apple did not push security updates last month that update & replace: XProtectPlistConfigData - v2149 - 2021-06-29 MRTConfigData - v1.81 - 2021-06-29 Using 2021's update release data, usually at least one update is pushed every month. It is difficult for me to believe nothing was eligible for additions/updates and those files do not usually appear within macOS updates themselves. No updates so far this month. Curious over here...
After a long interval, Apple has pushed an unannounced update for Mac's XProtect & MRT. Reference: https://eclecticlight.co/2021/08/23/apple-has-pushed-updates-to-xprotect-and-mrt-27/ HTH
Although previously silent for almost two months, Apple has pushed (v1.83) the second update to MRT (MRTConfigData) for macOS in two weeks: https://eclecticlight.co/2021/09/02/apple-has-pushed-an-update-to-mrt-8/ HTH