After using backup to setup my new Mac Mini my xCode App projects run ok in the Simulator but fail to Archive or Analyze with the error: "The specified item could not be found in the keychain." The item is a provisioning profile. I was able to Run, Archive and Validate these projects on my old Mac Mini just before the final backup. Are there known problems in backup of provisioning profiles or keychains? I have tried creating new profiles etc without success for several days. I'm not an expert developer so I'm hoping there is a simple solution. Please suggest the best way to resolve and/or clarify this problem.