 The user may be required to enter a password set in the firmware.In OS X El Capitan and later releases of macOS, the mode can be reversed to single user mode with the command codice_5 in Terminal, and the system can be fully rebooted in single-user mode with the command codice_6.Single User Mode is different from a Safe Mode boot in that the system goes directly to the console instead of starting up the core elements of macOS (items in codice_7, ignoring codice_8, codice_9, et al.