How to Remove Expired Certificates - Mac
Can't connect to wireless, but you were able to in the past? You may have expired certificates. Follow the below steps to get connected again.
1. Remove saved networks.
- Go to System Preferences > Network.
- Select WiFi Setup, then click the Subtract button - at the bottom of the list to remove the network.
- Next, select SecureMustangWireless, then click the Subtract button - at the bottom of the list to remove the network. Click the Apply button.
- If you are unable to see the networks, click the Advanced button. Under the Wi-Fi tab, remove WiFi Setup and SecureMustangWireless. Click OK, then click the Apply button.
2. Remove Cal Poly Device Enrollment profile.
- Go to System Preferences, then click Profiles.
- If present, select the Cal Poly Device Enrollment profile, then click the Subtract button - at the bottom of the list.
- If the Cal Poly Device Enrollment profile is not present, move to the next step.
3. Remove saved computer certificates.
- Use Spotlight Search to search for "keychain access".
- Once Keychain Access is open, make sure the lock at the top left of the box is unlocked. This will allow you to delete the necessary certificates.
- Under Category > All Items, search for “thawte” in the search box and click the Delete button to remove the certificates.
- Next, search for “clear” in the search box and click the Delete button to remove the certificates.
4. Restart computer.
5. Re-connect to wireless directly using SecureMustangWireless or WiFi Setup.
If you are unable to connect to wireless after following these instructions, please call or visit the ITS Service Desk: