How to see certificate for intermediate CA in Keychain

certificatekeychainSecuritysmime

When I check details of a certificate I only see information about the certificate itself. Is there any way to see the issuer’s certificate? In my case it’s an intermediate CA. The certificate that I care is for S/MIME (hence the tag), but I think this should apply to all kinds of certificates in general.

I think there should be a way because it’s very intuitive in Windows. Also Chrome on macOS displays the full chain for websites. I think Keychain.app has this information because it labels the certificate as a verified one.

Best Answer

Evaluate Certificate

  1. Launch the Keychain Access.app
  2. Select the certificate of interest
  3. Select the menu item: Keychain Access (menu) > Certificate Assistant (sub-menu) > Evaluate "certificate name"…
  4. Select Continue to choose Generic evaulation (certificate chain validation only)
  5. Select Show Certificate… button

You can now navigate through the certificate chain and view the leaf, intermediate, and root certificate details.

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