Due to a critical security vulnerability affecting macOS services, ITS will be sending a notification to all macOS devices to accept a security update that will protect your computer.
If you are on a Mac managed by ITS, you may see a notification to restart your computer, which will update your device.
To update manually, find out your OS version first (e.g., Tahoe). Then, click the Apple menu in the upper-left corner of your screen, then select System Settings > General > Software Update.
Click Update Now to start installing security patch Tahoe 26.3:

Click More Info… to find the list of other updates available and install 14.8.4 for Sonoma or 15.7.4 for Sequoia:
Contact the Service Desk should you run into any issues updating your device.