The certificate has an invalid issuer : keychain

Question

found weired issue in keychain. I have number of certificates in keychain. they are works before a day. but now there is a text "the certificate has an invalid issuer" in red color.

doesen't know what to do

Answer 1

To resolve this issue you have to follow below steps:

1) Open Keychain Access
2) Go to View -> Show Expired Certificates



3) Go to System in Keychain

4) Here you find that"Apple Worldwide Developer Relations Certificate Authority" is mark as expired. So delete it.
5) Download new Certificate from here.
6) Install it by double click on it.

Its done!!!

Answer 2

-> Download https://developer.apple.com/certificationauthority/AppleWWDRCA.cer and double-click to install to Keychain.

-> Select "View" -> "Show Expired Certificates" in Keychain app.

-> Remove Apple Worldwide Developer Relations Certificate Authority certificates from "login" tab and "System" tab in Keychain app.

Now, all certificates are valid