Description
Resetting the NVRAM or PRAM on an Intel computer may be required for some troubleshooting. For example, I have seen this fix issues related to picking up the MDM profile for Automated Device Enrollment. It is not a guaranteed fix for a specific problem, but can be needed if it appears something computer-related is hindering expected behavior.
Troubleshooting Steps
Shut down your computer, then turn it on and immediately press and hold these four keys together: Option, Command, P, and R. You can release the keys after about 20 seconds, during which your Mac might appear to restart.
On Mac computers that play a startup sound, you can release the keys after the second startup sound.
On Mac computers that have the Apple T2 Security Chip, you can release the keys after the Apple logo appears and disappears for the second time.
If your Mac is using a firmware password, this key combination does nothing or causes your Mac to start up from macOS Recovery. To reset NVRAM, first turn off the firmware password.
When your Mac finishes starting up, you might want to open System Preferences and adjust any settings that were reset, such as sound volume, display resolution, startup disk selection, or time zone.