Apple releases Mac OS X 10.5.5

Apple today released Mac OS X 10.5.5 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 included?

• Includes recent Apple security updates.
• Addresses stability issues with video playback, processor core idling, and remote disc sharing for MacBook Air.
• Addresses an issue in which some Macs could unexpectedly power on at the same time each day.
• Resolves a stability issue in TextEdit that could be found when accessing the color palette.
• Improves Spotlight indexing performance.
• Fixes an issue in which contacts might not sync properly with PalmOS-based devices.
• Improves iPhone sync reliability with iCal and Address Book.
• Includes improvements to Active Directory (see this article for more information).
• Improves Speech Dictionary.
• Fixes Kerberos authentication issues for Mac OS X 10.5 clients that connect to certain Samba servers, such as Mac OS X Server version 10.4.
• Includes extensive graphics enhancements.

Address Book
• Addresses stability issues that may occur when creating a Smart Group.
• Resolves a printing issue with address cards containing information that spans more than one page.

Disk Utility and Directory Utility
• Improves reliability when rebuilding a software mirror RAID volume in Disk Utility.
• Improves reliability of server status displayed in Directory Utility.

• Updates iCal to more accurately handle repeating events.
• Improves performance when choosing meeting attendees.
• Resolves an issue in which the “Refresh All” option may be dimmed (“grayed out”) in the contextual menu for certain calendars.
• Fixes issues with read-only calendars.
• Addresses an issue that prevents an invitee from moving an event to a different calendar.
• Resolves an issue with syncing published calendars.

• Addresses performance issues related to displaying IMAP messages.
• Resolves an issue with SMTP settings for AIM, Compuserve, Hanmail, Yahoo!, and Time Warner Road Runner email accounts.
• Addresses stability issues that may occur when dragging a file to the Mail icon in the Dock.
• Addresses an issue with the “Organized by Thread” view in which the date does not appear when the thread is collapsed.
• Resolves an issue in which RSS feeds could temporarily disappear from the sidebar.
• Improves Mail robustness when sending messages.
• Improves reliability when saving drafts that have attachments.

• Improves overall sync reliability.
• Improves Back to My Mac reliability.

Time Machine
• Improves Time Machine reliability with Time Capsule.
• Addresses performance issues that may affect initial and in-progress backups.
• Fixes an issue in which an incorrect alert message could appear stating that a backup volume does not have enough free space.
• Time Machine can now back up iPhone backups that are on your Mac, as well as other items in (~/Library/Application Support).

Mac OS X 10.5.5 is available via Software Update and also via standalone installers found on Apple’s Software Updates Website here.


  1. I’m already backing up my entire computer and about to do a complete reformat. I can’t Wait! The only way to install any new update, is to do a complete clean install and manually put everything back. Don’t use time machine to restore stuff back. Just make a new Time Machine Backup. It’s always better that way.

  2. “Fixes an issue in which an incorrect alert message could appear stating that a backup volume does not have enough free space.”

    Time Machine is supposed to delete the oldest backups to make room for new backups when the disk gets full—which means that the message “not enough free space” should never appear unless there is not enough space on the backup drive for the very first Time Machine backup.

  3. Oh, great, another reboot. Only 4 days and 9 hours since the last update – Quicktime or something.

    I realize the user can control the update frequency in Software Update, but the number of fixes and updates emerging from Cupertino is starting to rival that from Redmond. Seems to me that in the waning days of 10.4, we’d go 60 days or so between forced restarts.

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