Common questions about your Mac
How do I get support for my Mac mini? Go to Mac mini Support.
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 disk using Disk Utility on Mac in the Disk Utility User Guide.