If already at the base os version, these updates are highly recommended. If running an older operating system, a thorough evaluation and preparation is advised before upgrading.
Update macOS on Mac
Use Software Update
Before installing new software, it's a good idea to back up your Mac. If you have an external storage device, you can use it to back up your Mac with Time Machine.
To check for new software, open Software Update:
From the Apple menu in the corner of your screen, choose System Settings. Click General in the sidebar, then click Software Update on the right.
Or in earlier versions of macOS, choose Apple menu > System Preferences, then click Software Update.
If Software Update finds new software, click the Update or Upgrade button to download and install it. You will be asked to enter your administrator password, which is the password you use to log in to your Mac. During installation, your Mac might show a progress bar or blank screen several times.
Update your iPhone or iPad wirelessly
Back up your device using iCloud or your computer.
Plug your device into power and connect to the internet with Wi-Fi.
Go to Settings > General, then tap Software Update.
If you see more than one software update option available, choose the one that you want to install.
Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.
Update directly on your Apple Watch
If your Apple Watch has watchOS 6 or later, you can install updates without your iPhone:
Make sure that your watch is connected to Wi-Fi.
On your watch, open the Settings app.
Tap General > Software Update.
Tap Install if a software update is available, then follow the onscreen instructions.
Update your Apple TV manually
Go to Settings > System > Software Updates and select Update Software.
If there's an update, select Download and Install.
Wait for your Apple TV to download the update. Keep your Apple TV connected and plugged in to power until the update is complete.
After the update downloads, your Apple TV will restart, prepare the update, then install it. When the update is complete, your Apple TV will automatically restart again.
