Install Key chain
My i cloud Keychain Verification Code Sent by Apple is Not beeing accepted
MacBook Pro (Retina, 13-inch, Late 2013), Installation First
My i cloud Keychain Verification Code Sent by Apple is Not beeing accepted
MacBook Pro (Retina, 13-inch, Late 2013), Installation First
Deselect Keychain in System Preferences > iCloud then reselect it.
If that doesn't help, try here > iCloud: Troubleshooting iCloud Keychain
Install Key chain