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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 or or 562.903.4740 and we can manually update our system to allow your computer to upgrade.

StepWhat to doHow to do it
1Click the Apple icon at the top-left of your computer.

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2Click System Preferences... from the drop-down menu.
3Click Software Update.

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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.

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5Click Continue.

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6Click Agree on any pop-up windows.


The computer will automatically upgrade the macOS.


  • The computer will restart during the installation process.
  • The macOS upgrade can take between 45-60 minutes.