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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.
|Step||What to do||How to do it|
|1||Click the Apple icon at the top-left of your computer.|
|2||Click System Preferences... from the drop-down menu.|
|3||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.
|6||Click Agree on any pop-up windows.|
The computer will automatically upgrade the macOS.