title: Xcode problem with certifacte when I change the computer
body: <p>I am write IOS app with my friend computer using Xcode and when I try to update my app with another computer I got this message "Missing private key for signing certificate.
  Failed to locate the private key matching certificate "iPhone Distribution: Khaled Hussein (2.......M4)" in the keychain. To sign with this signing certificate, install its private key in your keychain. If you don't have the private key, select a different signing certificate for CODE_SIGN_IDENTITY in the build settings editor."   </p>