How to update macOS
Updating macOS keeps your Mac secure, stable, and compatible with the latest apps and features. This guide shows you how to check for updates, install them safely, and handle the most common prompts you may see along the way.
If your Mac is a little behind, you can usually update in just a few clicks from System Settings or System Preferences, depending on your macOS version.
Step-by-step fix
- 1
Back up your Mac
Before you install an update, it is smart to make a backup in case something goes wrong. You can use Time Machine with an external drive, or make sure your important files are saved to iCloud or another backup location.
- 2
Connect to power and Wi-Fi
Plug your Mac into power if it is a MacBook, and connect to a reliable Wi-Fi network. Major updates can take a while, and keeping your Mac powered helps prevent interruptions.
- 3
Open the update screen
Click the Apple menu in the top-left corner of your screen, then choose System Settings. In newer versions of macOS, select General, then Software Update.
If you use an older version of macOS, open System Preferences instead, then click Software Update.
- 4
Check for updates
Wait a moment while your Mac looks for available updates. If an update is available, you will see details about the version and what it includes. If your Mac says it is up to date, there is nothing else you need to do.
- 5
Start the installation
Click Update Now, Upgrade Now, or Restart Now if prompted. You may be asked to enter your Mac password or use Touch ID to approve the installation.
Some updates install quickly, while major macOS upgrades can take longer and may restart your Mac more than once.
- 6
Leave your Mac alone while it installs
Let the update finish without closing the lid, unplugging power, or forcing a restart unless the Mac appears frozen for a long time. Your screen may go blank, show a progress bar, or restart automatically during the process.
- 7
Confirm the update installed
After your Mac finishes restarting, go back to System Settings or System Preferences and open Software Update again. You can also check your macOS version by choosing Apple menu > About This Mac.
Frequently asked questions
How do I know if my Mac is up to date?
Open Apple menu > System Settings > General > Software Update. If your Mac says it is up to date, you already have the latest version available for your model.
What is the difference between a macOS update and an upgrade?
An update usually fixes bugs and improves security within your current macOS version. An upgrade is a larger change to a newer macOS version, which may take longer to download and install.
Can I use my Mac while it is updating?
You may be able to use it for a short time while the update downloads, but once installation starts, it is best to stop working and wait. The Mac may restart automatically and will not be available during that part of the process.
What should I do if the update will not install?
Check that you have a stable internet connection, enough free storage space, and that your Mac is plugged into power. Then try again from Software Update. If it still fails, restart your Mac and try once more.
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