Annoying Code Signing Error/Warning in Xcode 4.2?

Check your certificates for both release and debug builds -- probably one of them has an old or invalid distribution certificate.

You need to get the distribution certificate and set the Code Signing parameters to distribution profile in the 'Build Settings'. Click on your project in the top of the left pane, then choose the target, open the 'Build Settings' tab. Find 'Code Signing' group and the Distribution branch.

Set everything to your Distribution profile. This is were to look for the solution of your problem. You might want to play with these settings if it won't work right away.

If you do not have the Distribution Certificate you need to get it at the iOS Provisioning Portal.

I have done this, added an image to my original question. The thing is, this warning only displays when I build for my own development device. No warning is displayed when I either build for Archive or Simulator.

– Anders Oct 30 at 15:24.

I "solved" it by reinstalling Lion. I'm almost sure that it was the deletion of the "unknown" certificate that caused the warning. Because, now it's back and I don't get any warnings.It might also be possible to use some kind of 3rd-party data recovery software to get that certificate back.

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