This page lists the steps to upgrade your computer's macOS. It will take 45-60 minutes to complete, during which time you will be unable to use the computer.
If you encounter an error that says the upgrade is not allowed by IT, please contact the IT Helpdesk at firstname.lastname@example.org or or 562.903.4740and we can manually update our system to allow your computer to upgrade.
What to do
How to do it
Click the Apple icon at the top-left of your computer.
Click System Preferences... from the drop-down menu.
Click Software Update.
Click Upgrade Now.
Note: The macOS may begin to download (if it hasn't already). If so, we recommend connecting your computer to a wired network connection to shorten the time it takes to download the macOS.
Click Agree on any pop-up windows.
The computer will automatically upgrade the macOS.
The computer will restart during the installation process.