Common questions about your Mac
How do I get support for my Mac mini? Go to Mac mini Support.
I’m new to Mac. Are there tips for PC users? Yes! See the Apple Support article Mac tips for Windows switchers. Check out the Mac Basics Quick Tour. You might also be interested in Keyboard shortcuts on your Mac.
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 Take a screenshot on your Mac.
Where is my serial number? Choose Apple menu 
> About This Mac. The serial number is the last item in the list. You can find the serial number on the bottom of Mac mini. See the Apple Support article Mac mini: How to find the serial number.
How can I find the documentation for my Mac mini? 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 Browse manuals by product.
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 Mac mini? See Important safety information for your Mac.
How do I find the technical specifications? Go to Mac mini Tech Specs, or choose Apple menu > About This Mac and click the buttons at the top.
How do I check my disk for problems? Use Disk Utility. See Repair a storage device in Disk Utility on Mac in the Disk Utility User Guide.
How do I reinstall macOS? Use macOS Recovery. (The macOS Recovery process for Mac mini with Apple M1 chip is different than the process for other Mac mini models.) See How to reinstall macOS from macOS Recovery.
Note: Beginning with macOS Big Sur, Time Machine backups don’t include system files. See Back up and restore your Mac.
What should I do before selling or trading in my Mac? Back up your data, then restore your Mac to factory settings. See What to do before you sell, give away, or trade in your Mac.