Fire up Software Update: Direct Download: http://support.apple.com/downloads/ Apple today released Mac OS X 10.5.6 which 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. What's new: • 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. Mac OS X 10.5.6 is available via Software Update and weighs in at 190MB. Standalone installers should be available later today via Apple's Software Updates webpages here.