Show Serial Number (macOS)

Overview

Ways to obtain the serial number off a Mac

Command Line

macOS

ioreg -l | grep IOPlatformSerialNumber

OS X

system_profiler SPHardwareDataType | grep Serial

GUI

Click the Apple logo in the upper Left and click: 'About This Mac'

Reference

https://osxdaily.com/2011/04/25/get-mac-serial-number-command-line/