The 10.5.8 Update is recommended for all users running Mac OS X Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac, as well as specific fixes for:
- compatibility and reliability issues when joining AirPort networks.
- an issue that could cause some monitor resolutions to no longer appear in Displays System Preferences.
- issues that may affect Bluetooth reliability.
For detailed information on this update, please visit this website: http://support.apple.com/kb/HT3606.
For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222.
You can install the 165MB update by selecting Software Update from the Apple menu at the top left of your screen.