Wi-Fi network: Action required to renew certificates for Windows, iOS and MacOS devices

On the evening of Thursday, October 1, 2026, IT Services will renew the security certificate that secures authentication to McGill's wpa.mcgill.ca, wpa.bus.mcgill.ca, eduroam, and cusm-muhc.mcgill.ca Wi-Fi networks. 

This certificate allows you to sign on to the Wi-Fi network securely. 

For Android and some Windows devices, the change will be seamless, and no action is required. However, all iOS/MacOS devices and most Windows devices will display a message prompting users to accept the new certificate.  

If you receive that message, please follow the instructions below.  

Windows:

1. When prompted to Continue connecting, verify the certificate by clicking Show certificate details and checking that the certificate is “Issued to: wireless-login.mcgill.ca” and that it is “Issued by: Thawte TLS RSA G1”.
2. Once you have verified this information, tap on Connect to securely connect to the Wi-Fi network. 

iOS:  

1. Click More Details and verify that the Issuer is “DigiCert Inc” and the Valid Period is “2026-09-21 to 2027-04-08”.
2. Once you have verified the information, tap on Certificate to go back and select Trust to access the Wi-Fi network. 

MacOS:

1. When prompted to Verify Certificate, select Show Certificate to ensure that the certificate was issued by “DigiCert Global Root G2” and “Thawte TLS RSA G1” and that the expiry date is “Thursday, April 08, 2027”. 
2. Once you have verified the information, accept the certificate by selecting Continue to access the Wi-Fi network.  

If you experience Wi-Fi connectivity issues, please contact the IT Service Desk.