Find your MAC Address - WatchOS (iWatch)
Locate your Apple Watch's physical address to assist with connecting to the network. Identify and register your WatchOS device on your account.
Use these instructions to help you locate the MAC Address of your Apple Watch.
To find your WatchOS (iWatch) - MAC Address
1. Locate and tap the Watch app.
2. Tap General.
3. Tap About.
4. The WiFi/MAC address is listed by the Wi-Fi Address section.