Summary
The Mac OS X 10.5.6 Update is recommended for Mac OS X 10.5 Leopard versions 10.5, 10.5.1, 10.5.2, 10.5.3, 10.5.4, and 10.5.5. It includes general operating system fixes that enhance the stability, compatibility and security of your Mac.
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What's new in this update?
Address Book
* 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.
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Source
[Apple] Mac OS X 10.5.6 Update
12-15-08
[Apple] Mac OS X 10.5.6 Update
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