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How to find MAC address on iPhone or iPad
1. On your home screen, tap the Settings icon.
2. Tap General.
3. Tap About.
4. Here, find the Wi-Fi address, which is the MAC address you are looking for.
(Note: Until we have our own walkthrough on this, the screenshots have been copied from https://help.utk.edu/kb/index.php?e=2099&func=show)