OS X now prompts for and iCloud account when you log in for the first time. To disable the iCloud prompt on first login, edit the com.apple.SetupAssistant file in the Library/Prferences of the User Template. To do so, run the following defaults command: sudo defaults write /System/Library/User Template/Non_localized/Library/Preferences/com.apple.SetupAssistant DidSeeCloudSetup -bool TRUE Hat tip to Mike Boylan and Allen Golbig on finding the file. 🙂