Your account already has a signing certificate for this machine but it is not present in your keychain

Question

I get this error, verbatim, when trying to build and install to a device.

This is my environment:

• Xcode 8
• El Capitan

Has anyone run

Answer 1

I got this error immediately after a repair to replace the MagSafe module on my MacBook Pro (I am guessing the long period with the battery unplugged reset the SMC). I really didn't want to recreate the signing certificate so I went into the Keychain, realised I had so many expired keys still present and decided to delete the expired ones. I Go back to Xcode, clean the project and rebuild and boom...everything works fine. Hope this helps someone