I am trying to codesign an app and receive the following error: Warning: unable to build chain to self-signed root for signer "Apple Development: John Smith (########)" The Apple Development certificate I'm using is not trusted, and when I evaluate it, it tells me that there is No Root Certificate found. However, I have the following unexpired certificates on my machine: Apple IST CA 2 - GA Apple Root CA Apple Root Certificate Authority Apple Worldwide Developer Relations CA - G2 Apple Worldwide Developer Relations Certificate Authority Can anyone shed light on why my Apple Development Cert is not trusted / no root cert found when the root certs are installed? When I evaluate the Apple Root CA it tells me that the cert is valid, but "Root ALSO in System Roots". Is this a problem? Thanks in advance.