Mac OS X 
AirPort: How to enter a hexadecimal 64-character pre-shared key for WPA
Networks using Wi-Fi Protected Access (WPA) normally require a plain-text password or passphrase. Some networks may require you to enter a hexadecimal 64-character key instead.
Mac mini (Early 2006) and (Mid 2007): External ports and connectors
Learn about the external ports and connectors on the Mac mini (Early 2006) and Mac mini (Mid 2007) computers.
Mac mini: How to identify external power adapters on Mac mini models released before 2010
Learn how to identify external power adapters on Mac mini models released before 2010.
How to tell if Bonjour for Windows successfully installed
After you install Bonjour for Windows, here are a couple ways to determine if it’s up and running correctly.
Mac notebooks: Wait for your computer to fully shut down before closing the display
If you decide to shut down your Mac notebook rather than putting it to sleep, be sure you allow it to shut down completely before you close the display.
Firmware updates for Intel-based Macs require a GUID partition scheme
Firmware updates will not install on an Intel-based Mac if the computer is using a non-standard partition scheme, such as an fdisk scheme. You may see an “unexpected error occurred (0); unable to upgrade firmware” error message, or your computer … Continue reading
AirPort base stations: About AirPort base station status lights (LED)
Learn about AirPort base station status lights (LED).
How to verify or erase an AirPort Time Capsule disk
Learn how to verify or erase an AirPort Time Capsule disk.
Calibrating displays with built-in ambient light sensing
Learn about using Apple Display Calibrator Assistant and ColorSync Utility on displays with the built-in ambient light sensor.
