Hi DTS Engineer, I did already try removing the key material, and requesting a new certificate. I mentioned this in my previous message already. I'm not sure why, but this does not seem to help. Here is a screenshot: I also tried to read the links you sent, but they don't seem to be relevant in this case? I am simply trying to run code on my own phone xcode's default setting on the boilerplate application. How may I proceed from here? Is there anything else I should try?

Here is some more debugging: I think I do have a secret key matching the public key. In order to check that, I have exported the secret key and the certificate in a folder, an then verified that the RSA moduli are the same: % openssl x509 -inform der -in 'XXXXXXXX.cer' -noout -modulus Modulus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openssl pkcs12 -in 'Apple Development: XXXXX.p12' -passin pass:foo -nocerts -nodes | openssl rsa -noout -modulus Modulus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

Correct, both were exported from the keychain with password "foo". The key material added from xcode was not touched in any other way. I have tried to create a new account "alias" on my macbook, have it import both keys. The account is not associated with my iCloud. I marked that certificate as trusted manually. Can't get a valid identity from that account either.

Dear DTS engineer, I exported the intermediate certificates. I can see it marked as "trusted" from the separate user. However, no valid identity yet.

There is no "My Identities" tab in that screenshot, DTS Engineer. Where are we going with this?

Hi DTS Engineer, the tab is empty on both my personal user and the alias account. No certificate is listed there.