...
Log into the UT Network Portal (https://network.utexas.edu/ )
If you have not already, register the device.
Click "Register Wired Device" or "Register Wi-Fi Device" depending on your need.
Fill out the information in the form
Finding the MAC address (https://www.wikihow.com/Find-the-MAC-Address-of-Your-Computer ) - make sure you are getting the MAC address for the correct connection type (wired or Wi-Fi)
For UT owned computers, please enter the computer name (How do I find my Computer Name?). For other UT owned devices, please start with the description with your department abbreviation (ex. "ME - Dr. PhD's wireless robot 1")
Select "Unprotected" for the network profile
...