You can easily find your computer’s serial number by locating it within your operating system, whether it is macOS or Windows.
Mac
1. Select “About This Mac” from the Apple menu in the corner of your screen.
2. Locate the Serial Number.
Windows
1. Press Win + R to open the Run dialog.
2. Type “cmd” and click OK or press Enter.
3. Type “wmic bios get serialnumber” in the command line, and press Enter.
4. The Serial Number will be displayed on the screen.