I know that this is very common problem and I have gone through almost all the similar threads out here but no luck! This started happening after I renewed my membership with Apple!
I have confirm that I have private and public key in Key Chain, the required certificate listed under My Certificate, have my development certificate, and AWDR certificated installed but still under XCode organizer I get message saying “profile doesn’t match any valid certificate/private key pair in default key chain”. I also restarted mac twice.
Also I have confirmed everything mentioned at http://developer.apple.com/library/ios/#qa/qa1618/_index.html
What else to do? I have been scratching my head since last 3-4 hours now without any luck!
Thanks.
After so much pain I exported keys from other MAC where it works and imported on my Machine and RESTARTED MAC then it started working!
I could have revoked the certificates and create them from scratch so while generating CA Authority request certificate private keys would be generated on my machine. Learn to save these keys in .p12 format on shared location so that you simply need to double click to install it again!