Apple Mac OS X - 10.5.6

• Improves reliability of Address Book syncing with iPhone and other devices and applications.

AirPort

• Improves the reliability of AirPort connections, including improvements when roaming in large wireless networks with an Intel-based Mac.

Client management

• Improves reliability of synchronizing files on a portable home directory.
• Fixes an issue in Mac OS X 10.5.4 and 10.5.5 in which managed users may not see printers that use the Generic PPD.
• Client computers that use UUID-based ByHost preferences now respect managed Screen Saver settings.

iChat

• Addresses an issue that could cause an encryption alert to appear in the chat window.
• Setting your iChat status to "invisible" via AppleScript no longer logs you out of iChat.
• Resolves an issue in which pasting text from a Microsoft Office document could insert an image rather than text.

Graphics

• Includes general improvements to gaming performance.
  
• Includes graphics improvements for iChat, Cover Flow, Aperture, and iTunes.
• Includes fixes for possible graphics distortion issues with certain ATI graphics cards.
  

Mail

• Includes overall performance and reliability fixes.
• Improves Connection Doctor accuracy.
• Fixes an issue that could cause messages identified as junk to remain in the inbox.
• Fixes an issue that could cause Mail to append a character to the file extension of an attachment.
• Addresses an issue that could prevent Mail from quitting.
• Improves reliability when printing PDF attachments.

MobileMe

• Contacts, calendars, and bookmarks on a Mac automatically sync within a minute of the change being made on the computer, another device, or the web at me.com.

Networking

• Improves Apple File Service performance, especially when using a home directory hosted on an AFP server. Important: If you are using Mac OS X 10.5.6 (client) to connect to a Mac OS X Server 10.4-based server, it is strongly recommended that you update the server to Mac OS X Server version 10.4.11.
• Improves the performance and reliability of TCP connections.
• Improves reliability and performance for AT&T 3G cards.
• Updates the ssh Terminal command for compatibility with more ssh servers.

Printing

• Improves printing for the Adobe CS3 application suite.
• Improves printing for USB-based Brother and Canon printers.

Parental Controls

• Addresses an issue in which a parentally-controlled account could be unable to access the iTunes Store.
• Includes general fixes for time limits.
• Resolves an issue that prevented adding allowed websites from Safari via drag and drop.

Time Machine

• Fixes issues that could cause Time Machine to state the backup volume could not be found.
• Improves Time Machine reliability with Time Capsule.

Safari

• Improves compatibility with web proxy servers.
  
  

General

• Includes Mac OS X security improvements. See this website for more information.
• Addresses inaccuracies with Calculator when the Mac OS X language is set to German or Swiss German.
• Improves the performance and reliability of Chess.
• Improves DVD Player performance and reliability.
• Performance improvements for iCal are included.
• Fixes an issue when running the New iCal Events Automator action as an applet.
• Adds a Trackpad System Preference pane for portable Macs.
• Improves compatibility with smart cards such as the U.S. Department of Defense Common Access Card.
• Updates time zone data and Daylight Saving Time rules for several countries.