Users Manual

How do I take a screenshot on my Mac? Press Command-Shift-3 to take a screenshot
of the entire screen. Press Command-Shift-4 to take a screenshot of a selected area of
the screen. To learn more, see .
Where is my serial number? Choose Apple menu > About This Mac. The serial
number is the last item in the list. You can also find the serial number on the bottom of
your MacBook Air.
Ask Siri. Say something like: “What’s my computer’s serial number?”
How do I know which model of MacBook Air I have? See the Apple Support article
. You can also choose Apple menu > About This Mac
to view the model information.
How can I find the documentation for my MacBook Air? To find the Essentials guide,
choose Apple menu > About This Mac, click the Support tab, then click User Manual.
From the Support tab, you can also click “macOS Help” to open the user guide for the
operating system. For older Mac models, see .
How do I get help for an app? When you’re using the app, click the Help menu in the
menu bar at the top of the screen.
Where is the safety information for my MacBook Air? See
.
How do I find the technical specifications? Go to , or choose
Apple menu > About This Mac and click the buttons at the top.
Ask Siri. Ask Siri for information about your Mac. Say something like:
“How fast is my Mac?”
“How much memory does my Mac have?”
“How much free space do I have on my Mac?”
“How much iCloud storage do I have left?”
How do I check my disk for problems? Use Disk Utility. See
in the Disk Utility User Guide.
What should I do before selling or trading in my Mac? Back up your data, then restore
your Mac to factory settings. See
.
How do I reinstall macOS? Use macOS Recovery. Beginning with macOS Big Sur, Time
Machine backups don’t include system files. See
.
Take a screenshot on your Mac
Identify your MacBook Air model
Browse manuals by product
Important safety information
for your Mac
MacBook Air Tech Specs
Repair a storage device in
Disk Utility on Mac
What to do before you sell, give away, or trade in your
Mac
How to reinstall macOS from macOS
Recovery