Common questions about your Mac
How do I get support for my Mac Pro? Go to Mac Pro Support.
Where is my serial number? Choose Apple menu 
> About This Mac. The serial number is the last item in the list.
How can I find the documentation for my Mac Pro? To find the Mac Pro 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 Pro? See Important safety information for your Mac.
How do I find the technical specifications? 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.