The most commonly cited default password is:
The method to enter the password depends on whether the unit is the older "button-style" or the newer "touchscreen-style" (MAC 5500 HD). mac 5500 service password
: If the device has been previously configured, the service password may have been changed by the installer or operator. Resetting the unit to factory defaults (via hardware reset button or serial console during boot) will clear the service password back to the default. The most commonly cited default password is: The