A new tech note from Apple details a flaw that can occur during the initial setup of the new 12-inch Retina MacBook that causes the process to stop temporarily -- sometimes for a prolonged period -- before finishing. According to the new tech note, Apple recommends that if users experience the issue they can restart the initial setup process by restarting, and can opt to disconnect from the Internet in order to allow the setup to proceed, and then connect to the Internet afterwards. The problem appears to center around Apple ID setup or iCloud account creation.