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.

    Remove Saved Networks

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.

    Remove Cal Poly Device Enrollment Profile

     
  • 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.

    Remove saved computer certificates - thawte
  • Next, search for “clear” in the search box and click the Delete button to remove the certificates.

    Remove saved computer certificates - clear

4. Restart computer.

Computer Restart

5. Re-connect to wireless directly using SecureMustangWireless or WiFi Setup.

Connect to SecureMustangWireless

Get Help

ITS Service Desk
Monday-Friday 8 a.m. - 5 p.m.  
Location: Natatorium (No. 46), across from Spanos Stadium 
Phone: 805-756-7000
Email: servicedesk@calpoly.edu

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