You have configured your Mac to connect to the eduroam wireless network according to the published instructions, but you are still unable to connect.

There are multiple possible causes for failed connections to the eduroam Wi-Fi, even if the connection was configured correctly.

1. In your Mac's menu bar, click the Wi-Fi icon. Next to "Wi-Fi", slide the switch to the "off" position (to the left). Then, slide the switch to the "on" position (back to the right).
   
   Check to see if the problem has been resolved. If not, proceed to the next step for additional troubleshooting.
   
   TIP: If you connect to eduroam Wi-Fi in one location and then move locations, your Mac may attempt to maintain its connection with the wireless access point at the previous location. This can result in a slow connection or the appearance that there is no connection at all. To resolve the problem, simply disable Wi-Fi on your Mac and enable it again by repeating this step. This will cause macOS to re-establish a connection using the closest wireless access point.
   
   
   
   
2. Open the Keychain Access app. The best way to do this is by using Spotlight.
   
   
   
   
3. If prompted to manage your passwords in the Passwords app or in System Settings, click Open Keychain Access.
   
   
   
   
   
   
4. If prompted for authentication, use Touch ID or type your user account password.
   
   
   
   
   
   NOTE: Before proceeding, it is recommended that you make a backup of your keychain in case you need to restore it.
   
   
5. Delete any certificates or passwords related to eduroam from all applicable keychains, including Login, iCloud, System, and System Roots. You can do this by searching for "eduroam", as well as "8021x.ttu.edu"; click once on the desired item to select it. Then, press the delete key on your keyboard.
   
   NOTE: The certificate may be named "8021x.ttu.edu".
   
   TIP: To delete multiple certificates and passwords, click each one while holding the command key on your keyboard. When you are done selecting, press the delete key on your keyboard.
   
   
   
   
6. To confirm that you want to remove the item(s), click Delete.
   
   
   
   
   
   
7. You may be prompted to authenticate with your admin credentials. If so, type a username and password with administrative access on your Mac. Then, click Update Settings.
   
   
   
   
8. In your Mac's menu bar, click the Wi-Fi icon again and choose Wi-Fi Settings.
   
   
   
   
9. Ensure that Wi-Fi is chosen in the left-hand pane. Next to "Ask to join new networks", slide the switch to the "off" position (to the left). Then, click Advanced.
   
   
   
   
10. In the "Known Networks" field, check to see if you have any entries for eduroam. If so, click the ellipsis (three dots) next to the entry and choose Remove From List.
    
    
    
    
11. Click Remove to confirm.
    
    
    
    
12. You may be prompted to authenticate with your admin credentials. If so, type a username and password with administrative access on your Mac. Then, click Modify Settings.
    
    
    
    
13. Click Done.
    
    
    
    
14. Click Details.
    
    
    
    
15. In the left-hand pane, click the DNS tab. In the "DNS Servers" section, click any entry to select it. Then, use the minus sign (−) button to remove any entries that were manually added.
    
    NOTE: Manually-added entries are easily identifiable because they are the ones that the system will allow you to remove. Default DNS servers assigned by DHCP will be grayed out and cannot be removed; this is expected.
    
    
    
    
16. In the "Search Domains" section, click any entry. Use the minus sign (−) button to remove any entries that were manually added. Then, click OK.
    
    
    
    
17. In the left-hand menu, click Wi-Fi. Then, scroll down to the bottom and click Other.
    
    
    
    
18. Configure the following information, and then click OK.
    
    
    • Network Name: eduroam
    • Security: WPA2 Enterprise
    • Mode: Automatic
    • Username: your_home_campus_email_address (for example, john.doe@someuniv.edu)
    • Password: your_home_campus_account_password
    
    
    
    
    
19. Repeat step 1. Once Wi-Fi is disabled and enabled again, your Mac should automatically connect to the eduroam network if it is within range.
    
    
20. After turning Wi-Fi off and back on again in the previous step, you may be prompted about certificate verification. If so, click Continue.
    
    
    
    
21. If prompted to authenticate, type a username and password with administrative access on your Mac. Then, click Update Settings.
    
    

Outcome

Your Mac is connected to the eduroam wireless network.