This application will easily reset the contents of the NVRAM without having to keep the key combinaition on the keyboard and powering on your mac. This application can be useful when you have a wireless keyboard which might not work properly when your power up your mac.
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.