Apple Updates Mac OS X to 10.5.6 with 39 Changes

| Leopard

Apple released Mac OS X 10.5.6, a significant update to Mac OS X "leopard" 10.5. The patch includes 39 different changes, improvements, and bug fixes, including fixes for Time Machine, syncing improvements, graphics performance improvements, and a variety of other changes.

Apple also bundled in a number of security fixes into the update, including patches for several potential exploits that could allow a bad guy to take control of your Mac. All told, there are some 16 security fixes included in the update.

The update is a 190 MB download through Software Update, and it requires a restart.

The release notes in full:

Address Book

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


  • 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.


  • 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.


  • 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.


  • 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.


  • 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


  • 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.


  • 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.


  • Improves compatibility with web proxy servers.


  • 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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Bryan Chaffin

Thanks, distarr7!  The article should be HTML free, now. smile



Any chance this update will fix the problem users have noted with iMacs connecting to wireless (airport) networks?  I have had a very difficult time with connections, where my macbook has no problems at all - and it is right next to the iMac.  Hopefully this update will address that issue.


Hmm, I’m getting large pop-up advertising windows suddenly on this site. This is new and very, very unwanted. I’m going to assume it’s an experiment for a week and then if it becomes permanent - it’s good bye.

Lee Dronick

“Hmm, I?m getting large pop-up advertising windows suddenly on this site. This is new and very, very unwanted. I?m going to assume it?s an experiment for a week and then if it becomes permanent - it?s good bye.”

I haven’t seen any “traditional” pop-ups that open a new window, but if you mouse over any text with double underlines then you get a pop-up. Mouse away and those double pop-ups go away in a second or two. I don’t like them, but we are not charged a fee for visiting the site and the bills must be paid somehow.

Okay on topic. Has anyone had trouble installing this update? There is some chatter about it hanging and not installing.


yes about problems. my MacBook pro 15” seems stuck at “configuring installation” and I’m wondering what to do.

Lee Dronick

“yes about problems. my MacBook pro 15? seems stuck at ?configuring installation? and I?m wondering what to do.”

That is what I am reading on the forums I am going to wait a bit before installing the update.

Sorry you are having problems with the update, but read the thread at Apple


thanks for the link ... I followed the consensus there and downloaded the stand alone updater ... it ran fine ... I don’t think any damage was done by forcing the MacBook to restart in the middle of the hang.


I went to Software Update and downloaded both 10.5.6 and an SDK update. Both were listed as >300Mb in size. Ran the OS-X update, rebooted, ran the SDK update, rebooted, no problems.


Downloaded & Installed it on 1.6 PPC G5 Cheese Grater & it did a double restart, but otherwise works well, snappy and as usual..

“It just works.”

From North Pole


Do NOT install

After install on a 17” Macbook pro, nearly every message in Apple Mail that has an attachment causes Mail to crash when viewing the message.

Major Bug



Does anyone know if this fixes the MacBook Trackpad sticking issue? Occasionally my Trackpad would stop responding for a few seconds. I looked around and there was a bit of buzz on the web about how this was happening to a fair number of MacBook and Pro users.

Bryan Chaffin

A question for Jonk: We aren’t running any popup ads on the site—Is it possible the ad was from another window open in a tab?  Are you perhaps talking about the ContentLink ads with the double underlines?


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