I've started to have an issue with my thunderbolt screen not waking up and want to reset nvram to see if it helps. I shutdown, and immediately after startup sound depress CMD, option, P and R keys together and continue holding them, after a minute or so this brings me to the OS X utility screen? Has the process to rest nvram changed?
MacBook Pro, OS X Mountain Lion (10.8.5)
Resetting NVRAM
Try Reseting SMC:
Kim
I've done exactly that twice, and it just takes me to the OS X utility. I never make it to the 2nd sounds which should indicate I can let go of the keys.
Yea I thought the same as it's a little awkward combination of keys, but I tried the second time and got the same result. I'll try it again tomorrow, and let you know.
Hi there, am closing this. The problem I had was that the R key was being pressed before the P key, and this made a difference. I've reset NVRAM now, sadly it didn't resolve the issue with my Thunderbolt screen.
It sounds like you are not holding down all 4 keys.
MacBook Pro mid-2012 nvram reset brings up OS X utility
