After upgrading to macOS 10.12 Sierra and Xcode 8, code signing is broken for me.
Every time I try to sign an app, no matter how simple, I get /usr/bin/codesign failed with exit code 11.
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3 Answers
Retry running codesign.
Occasionally, we encounter build failures in our CI system from codesign with exit code 11 for no apparent reason. Looking in Console.app I see a segmentation fault in thread Dispatch queue: com.apple.security.XPCTimeStampingService. I understand that this means that some error occurred trying to talk to the timestamp server.
This isn't the same issue as OP, but I found this question while investigating my issue.
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Encountered the same issue today, but in my case, there were no expired certificates in Keychain. Trick from https://forums.developer.apple.com/thread/65055 worked for me:
I got both issues with a fresh new certificate, so it was not just about the certificate being old. But I got around it by specifying the certificate by ID instead of name — first getting the ID via:
security find-identity -p codesigningand, from the output of that, copying the long hex ID for the key I want, and pasting that into my codesign invocation:
sudo codesign -s 001CA54450805B2D8D1646793D0339BA7EB931D1 --timestamp=none /opt/local/bin/ggdb
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Turns out the reason was that I had to delete expired certificates from Keychain.
Hope I saved you a few minutes of aimless, frustrated troubleshooting.