If you have trouble using AirPort Extreme wireless communication

ÂMake sure the computer or network you are trying to connect to is running and has a wireless access point.

ÂMake sure you are within antenna range of the other computer or the network’s access point by checking the AirPort (Z) status menu in the menu bar. Up to four bars appear, indicating full signal strength.

Nearby electronic devices or metal structures can interfere with wireless communication and reduce this range. Repositioning or rotating the computer might improve reception.

ÂMake sure you have properly configured the software according to the instructions that came with your base station or access point.

ÂSee AirPort Help (choose Help > Mac Help, then choose Library > AirPort Help from the menu bar). Also see the instructions that came with the wireless device for more information.

If your computer’s hard disk is not recording data correctly

ÂIn a few instances, if the hard disk undergoes unusually strong vibration, the Sudden Motion Sensor might become active and cause dropped frames or unrecorded portions of sound or data when the disk is recording intensively. If this occurs, make sure that your MacBook is in a stable environment without vibration or abrupt movement.

ÂIf vibration isn’t the problem, run Disk Utility (in /Applications/Utilities/) to check the drive.

94Chapter 5 Troubleshooting

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Apple APLLE MACBOOK manual If your computer’s hard disk is not recording data correctly