Overview

If a Mac OS X has issues related to settings stored in NVRAM, resetting it might help in restoring an application.

 

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Process

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.

Note: After resetting NVRAM, you may need to reconfigure settings for speaker volume, screen resolution, startup disk selection, and time zone information.

 

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Confirmation

Once the keys are released, the NVRAM in Mac is reset and should function properly.

 

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