MRT stands for Malware Removal Tool. There was a big Zoom.app security flaw recently, and Apple plugged it up with an MRT update.
https://www.sentinelone.com/blog/apples-malware-removal-mrt-tool-update/
To see if your Mac needs it, run this in Terminal: softwareupdate -l --include-config-data
If you want your Mac (or all your Macs) to install all updates including the security patches (MRT, Gatekeeper, XProtect), run this on a Mac 10.12 and up: softwareupdate -ia --include-config-data
Also, you can download the packages and deploy them...
In Terminal, run this command: softwareupdate -da --include-config-data
Then go to /Library/Updates. Here you'll find the packages.


@mvu Thank you very much, I did not have any idea about MRT and the reason why Apple plugged it up with an update.
Also, thank you very much for teach me how to install all updates including the security patches and how to download the packages and deploy them.
I have learned something new today
Camelia
Hello,
How do I know the Malware Removal Tool installed version via terminal in macOS Mojave and macOS High Sierra?
Thanks
Came
Enter this in Terminal: defaults read /System/Library/CoreServices/MRT.app/Contents/version CFBundleShortVersionString
@mvu Thank you very much, for continue teaching me :*)
Camelia
@mvu
Hello,
If I run this command: softwareupdate -da --include-config-data and search
in /Library/Updates, to find the packages, these folders are created:
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
041-91647 | Gatekeeper Configuration Data 140
061-26575 | Gatekeeper Configuration Data 181
Why the command downlads several folders with the same package but different versions?
Then I opened Console.app search for GatekeeperConfigData.pkg and the only link I found was
http://swcdn.apple.com/content/downloads/24/38/041-91647-A_NU5XWH8QYY/etfyxe417py9f6klgbkhkd2jglyahj4jxd/GatekeeperConfigData.pkg
But this link installs Gatekeeper v140 and I need the latest v181 but I can't find the link
in Console.app for Gatekeeper v181
What am I doing wrong?
Thanks
Camelia