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**sebagsm** · 01-17-2016, 01:07

do a nvram reset:

1. Shut down your Mac.
2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R.
3.Turn on your Mac.
4. Press and hold the Command-Option-P-R keys immediately after you hear the startup sound.
5.Hold these keys until the computer restarts and you hear the startup sound for a second time.
6.Release the keys.

01-17-2016, 01:07	#2 (permalink)
sebagsm Moderator Join Date: Sep 2002 Location: Serbia/Hungary Age: 42 Posts: 1,043 Member: 15994 Status: Offline Thanks Meter: 263	do a nvram reset: 1. Shut down your Mac. 2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R. 3.Turn on your Mac. 4. Press and hold the Command-Option-P-R keys immediately after you hear the startup sound. 5.Hold these keys until the computer restarts and you hear the startup sound for a second time. 6.Release the keys.