macOS - Install "Other" Updates
Updates you can install if your computer without upgrading to a new OS.
Open System Preferences
Click Software Update
Click More Info
Note: If More Info is missing, click the Apple in the upper left corner of your screen and choose About this Mac. If your computer is running macOS Mojave, you will need to upgrade to macOS Big Sur or Monterey. ITS always recommends you have a backup of your files prior to upgrading.
Click Install Now and the install will begin. Updates generally take 15-40 minutes.