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 has now been released for Sequoia and Tahoe via iCloud. If you want to check it manually, use the Terminal command
sudo 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 using
sudo 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 seems to have updated itself.

Updated 0450GMT 9 October 2025.