Apple has released an update to XProtect for all macOS
Apple has released its weekly update to XProtect, bringing it to version 5318. As usual, it doesn’t release information about what security issues this update might add or change.
This version makes several changes to the Yara definition for MACOS.COMPLIANTPIRATE.DEFU, but doesn’t add any new detection rules.
You can check whether this update has been installed by opening System Information via About This Mac, and selecting the Installations item under Software.
A full listing of security data file versions is given by SilentKnight and SystHist for El Capitan to Tahoe available from their product page. If your Mac hasn’t yet installed this update, you can force it using SilentKnight or at the command line.
If you want to install this as a named update in SilentKnight, its label is XProtectPlistConfigData_10_15-5318
Sequoia and Tahoe systems only
This update hasn’t yet been released for Sequoia and Tahoe via iCloud, but hopefully will be shortly. If you want to check it manually, use the Terminal commandsudo xprotect check
then enter your admin password. If that returns version 5318 but your Mac still reports an older version is installed, you should be able to force the update usingsudo xprotect update
However, if the regular update has been installed in the old location, XProtect is likely to update its new location from that. There’s nothing you can do to force that, but it may well explain why your Mac seem to have updated itself.