How do you reset Nvram on MacBook?
Kevin L.
answered 12/16/19
10+ year developer and computer engineer
Shut down your Mac , 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.
( https://support.apple.com/en-us/HT204063 )
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