Expired WWDR Intermediate certificate

February 23, 2016

Apple Worldwide Developer Relations Certificate Authority Intermediate certificate expired on 14 Feb 2016 and lot of iOS developer were getting issue in using all existing certificates which started to show error “this certificate has an invalid issuer” all of sudden.
This issue has been addressed by Apple and to solve it follow the steps given below –

1. Open Keychain access
2. Select “View” -> “Show Expired Certificates” in Keychain app.
3. Confirm “Certificates” category is selected.
4. Remove expired Apple Worldwide Developer Relations Certificate Authority certificates from “login” tab and “System” tab. (Some person may have in one of the tab and some may have in both tab, however we need to remove it from all places)
5. Download the new certificate provided by Apple from the link – here
6. After download click on downloaded certificate and it will get installed in keychain, and here you go, your all old cert will start to work started giving error “this certificate has an invalid issuer”.