Apple has just released another update to XProtect for all versions of macOS, its second in the last 4 days, bringing it to version 5353. As usual it doesn’t release information about what security issues this update might address.

This version adds two new Yara rules for MACOS.TIMELYTURTLE.XOPADE and MACOS.TIMELYTURTLE.PACOPA, and in the Osascript rules in XPScripts.yr it makes two amendments to the rule for MACOS.OSASCRIPT.SYPR.

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 Golden Gate 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_15-5353

Sequoia, Tahoe and Golden Gate systems only

This update has now been released for Sequoia and later 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 5353 but your Mac still reports an older version is installed, you should be able to force the update using
sudo xprotect update