Resetting PRAM / NVRAM
Problem
PRAM and NVRAM reset may be necessary if any of the following issues are occurring
Sound/Speaker issues
Resolution and Display Scaling
Startup Disk/Boot up problems
Mouse/Trackpad/Keyboard inconsistency
Application Fonts and Dialog Boxes
Solution
Shut down the Mac
Turn it on and immediately press and hold: Option, Command, P, and R
You can release the keys after about 20 seconds, during which the Mac might appear to restart
On Mac computers that play a startup sound, release the keys after the second startup sound
On iMac Pro, 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 PRAM/NVRAM, first turn off the firmware password.
If there are any questions or issues please contact IT Services