Code Sign error: Certificate identity 'iPhone Developer: My Name (xxx)' appears more than once in the keychain

Question

I m stuck with this error:

Code Sign error: Certificate identity \'iPhone Developer: My Name (xxx)\' appears more than once in the keychain. The codesign tool requir

Answer 1

Xcode 4.3 now searches all keychains for signing certificates but that is increasing the frequency of the build error:

Certificate identity (x) appears more than once in the keychain...

Apple's steps to resolve it are here: "How do I resolve the CodeSign error: Certificate identity appears more than once in the keychain?"

However, if you are affected by the keychain bug mentioned in the final note of that guide, following is a simpler and preferred solution to problem:

1) Keychain Access > Edit > Keychain List, uncheck "Shared" for the login keychain.

2) next, IF going back into the Keychain List you find the login keychain is still marked as Shared, create a backup of the following files and then remove them if they exist:

/Library/Preferences/com.apple.security-common.plist
~/Library/Preferences/com.apple.security.plist

3) Retry your build.

Answer 2

I've had the same issue and I fixed it deleting every certificate from my keychain, every provisioning from my Xcode and every provisioning profile from my device and later... redone it again. I guess, It normally happens when you are working with differents profiles and you have created many certificates for the same provisioning.

Answer 3

I had this issue with XCODE 4.5, because Organizer was still keeping the developer certificates.

• Deleted all provisioning profiles from Organizer
• Deleted all developer certificates from KeyChain--Also show the expired list
• Close XCode
• Download dev certificate
• Install Provisioning profiles
• Clean build
• Check organizer certificate list and make sure you got one
• Check Keychain to make sure you got one certificate
• Archive

Answer 4

If you already deleted all other Developer Certificates in your KeyChain and the Error is still coming up, then try to delete all old/unused keys (private key) with your name. The one that's necessary, is the one with the little "folder-enhancer-icon" next to its name. Keeping this and deleting the rest fixed it for me.

Answer 5

I've had the same issue as well. I think you can get to this state in a variety of ways, but for me, it was because a certificate had recently expired.
What I didn't realize was that Keychain Access will hide expired certificates. Go under "View" and make sure you're not hiding the duplicate certificate.

Answer 6

Try to remove certificates from the xcode organizer.