What to do if the keychain says “Certificate is not trusted” in iOS development certificate


What to do if the keychain says “Certificate is not trusted” in iOS development certificate

The other day, I was setting up various developments on a new Mac, and when I saved the certificate used for Xcode development in the keychain, like the capture, “~ certificate is not trusted” was displayed.mac-keychain-certificate-trust-0

It took a long time to resolve this, so I will leave it as a memorandum.

How to resolve “Certificate is not trusted”

In conclusion, the method I practiced is to download additional certificates from Apple’s site.
After a lot of research, on the keychain, select “Get Info” for the certificate and on the details screen that appears, select “> Trust” and set the certificate trust settings to “Always trust”. However, I felt that it was dangerous, and when I checked the keychain of another Mac, it was not set like that, so I stopped it.
The certificate written above can be downloaded from Apple’s following site.

On this site, click Worldwide Developer Relations - G3 (Expiring 02/20/2030 00:00:00 UTC) to download the certificate and save it to your keychain. “This certificate is valid” is displayed 🎉
To be honest, I don’t know the reason (if anyone knows, I’d be happy if you could tell me).
However, if there are people who are having trouble with the same thing, I hope that it will be helpful.
There was also a page that seems to be a list of certificates on the above site, so I will list it for reference.



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