How do i reset NVRAM on 2009 Mac Book
How do i reset NVRAM on 2009 Mac Book
MacBook (13-inch Aluminum Late 2008)
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OS X Lion- Reset your computer’s PRAM
- 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 4.
- Turn on the computer.
- Immediately press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.Continue holding the keys down until the computer restarts, and you hear the startup sound for the second time.
- Release the keys.
Resetting PRAM may change some system settings and preferences. Use System Preferences to restore your settings.