User Guide

12 - Mac mini Troubleshooting

Reset PRAM and NVRAM

Procedure

1. Shut down the computer.

2. Locate the following keys on the keyboard: Command, Option, P, and R. You will need

to hold these keys down simultaneously in step 4.

3. Turn on the computer.

4. Press and hold the Command-Option-P-R keys. You must press this key combination

before the gray screen appears.

5. Hold the keys down until the computer restarts and you hear the startup sound for the

second time.

6. Release the keys.

7. Your computer's PRAM and the NVRAM are reset to the default values. The clock

settings may be reset to a default date on some models.