how to reset nvram and pvram on macbook air 2011

I have macbook air 2011 when power on and hold the ( Alt ) ket took me lock how can I unlock this case ? please help anyone !!!!

MacBook Air, Mac OS X (10.6), Macbook Air 13 inch

Posted on Jan 9, 2012 12:08 PM

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4 replies

Jan 9, 2012 5:20 PM in response to Naktal Mac

Here you go!


SMC RESET


  • Shut down the computer.
  • Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
  • On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
  • Release all the keys and the power button at the same time.
  • Press the power button to turn on the computer.



PRAM RESET


  • Shut down the computer.
  • Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step
  • Turn on the computer.
  • Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
  • Hold the keys down until the computer restarts and you hear the startup sound for the second time.
  • Release the keys.

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how to reset nvram and pvram on macbook air 2011

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