About the Mac OS X Server v10.5.5 Update

This software updates Mac OS X Server versions 10.5, 10.5.1, 10.5.2, 10.5.3, or 10.5.4 to 10.5.5.

This article has been archived and is no longer updated by Apple.

Important: Read before installing.

  • The installation process should not be interrupted, even if the progress bar remains unchanged for several minutes. If a power outage or other interruption occurs during installation, use the standalone installer (see below) from Apple Support Downloads to update.
  • You must have an administrator account password that does not contain spaces or Option-keyed characters to install this update. The password may not be left blank. If you need to change your password, see this article.
  • This update can be installed on non-startup volumes, but you should only do this if the current startup volume has already been updated to Mac OS X Server version 10.5.5. The simplest way to avoid issues from an improper installation is to start up from the volume that you wish to update.
  • You may get unexpected results if you've installed third-party system software modifications, or if you have modified the operating system through other means. (This doesn't apply to normal software installation.)
  • You should use Mac OS X Server Admin Tools version 10.5.5 to administer a server running 10.5.5. The 10.5.5 version of the Admin Tools is included in the Mac OS X Server v10.5.5 Update. The tools are also available from Apple Support Downloads for installation on Mac OS X v10.5.5 (client).


There are three ways to update to Mac OS X Server version 10.5.5:

  • Use Software Update
  • Install from a standalone installer
  • Install on a remote server via Server Admin or the softwareupdate command-line utility

Software Update installation

Software Update may have referred you to this document. For more information on this feature, see this article. Because some updates are prerequisites for others, you may need to use Software Update more than once to obtain all available updates.

Standalone installer

If you want to download and manually install the update, an installer is available from Apple Support Downloads. This a useful option if you need to update multiple computers but only want to download the necessary update once.

Note: There are two separate standalone installers. The Mac OS X Server v10.5.5 Update is for installation on Mac OS X Server version 10.5.4 only. The Mac OS X Server v10.5.5 Combo Update can be installed on Mac OS X Server versions 10.5, 10.5.1, 10.5.2, 10.5.3, or 10.5.4.

Remote installation

If you need to install the update on a remote server, you can do so using the Server Admin application or the softwareupdate command-line tool.

What's included?

This update includes improvements delivered in the Mac OS X Server version 10.5.1, 10.5.2, 10.5.3, and 10.5.4 updates, in addition to the improvements listed below:

File Services

  • The NFS service now properly allows access to files and folders that have an Access Control List including the "everyone" group.
  • The SMB service will no longer stop working when it encounters an Access Control Entry with an unknown UUID.
  • Server Admin can now enable Strict Locking for the SMB file service.

Collaboration Services

  • Resolves an issue that could cause slow Wiki and Blog performance accompanied by messages in the system.log: "DirectoryService: Potential VM growth in DirectoryService..."
  • Improved Wiki, Blog and Podcast compatibility with Safari and iTunes on iPhone and iPod Touch.
  • Improved Wiki performance on Wiki servers connected to an external directory system.
  • Active Directory users can now create their weblog directly from the /users webpage, if the Wiki server is configured for clear-text authentication, as described in this article.
  • Resolves issues between the iChat service and the Adium instant messaging client.
  • Correctly authenticates iChat connections when using Kerberos authentication and Service Access Control Lists (SACLs).
  • Improves Calendar service performance for iCal users.

Directory Services

  • Improves reliability of Directory Services for NetBoot and DHCP services.
  • When Mac OS X Server is configured as a Primary Domain Controller for the SMB service, Open Directory groups now correctly appear as domain groups instead of local groups.
  • Mac OS X Server configured as a Backup Domain Controller will now correctly take over authentication if the Primary Domain Controller goes off line. Note: the Backup Domain Controller must have guest access enabled for the SMB service.

Active Directory Plugin

  • Resolves issues binding or authenticating to an Active Directory domain when packet signing and encryption are enabled.
  • Improves reliability of the "Prefer this domain server" option when binding to an Active Directory domain.
  • Reduces the delay when authenticating to an Active Directory-based mobile account when the Active Directory Domain Controller is not accessible.
  • Improves reliability of binding to a multi-level Active Directory domain.
  • Reduces delays when authenticating as an Active Directory user in an Active Directory domain whose name ends in ".local".

Podcast Producer

  • Resolves an issue in Ruby that prevented posting podcasts to iTunes U.


  • Improves reliability of sshd, which handles incoming ssh (remote login) connections.


  • Addresses a potential kernel panic when performing Time Machine backups to a RAID volume that is connected via a hardware RAID PCI Card to an Xserve or Mac Pro.


Server Admin

  • Server Admin can now correctly enable and show the status of RADIUS or Kerberos authentication for the PPTP VPN service. Note: For more information about enabling Kerberos authentication for PPTP, see this article.
  • RADIUS service now reliably displays the primary IP address for 802.11n-enabled AirPort Base Stations.
  • Server Admin can now sort by Value in the Zones tab of the DNS service.

System Image Utility

  • Fixes issues with certain options in the Apply System Configuration Settings action, including "Change ByHost settings", "Apply Computer Name and Local Hostname", and "Map clients to other directory servers".
  • The Add Packages and Post-Install Scripts action now works correctly when creating a NetInstall image from a volume.

Workgroup Manager

  • Improves browsing, adding, and removing computers to or from a computer group.

Directory Utility

  • Improves reliability of server status displayed in Directory Utility.

Disk Utility

  • Improved reliability of rebuilding a software mirror RAID volume.

Addtional improvements

  • Improves Mac OS X Server Security. For more information about the security content of Mac OS X Server v10.5.5 see this article.
  • Mac OS X Server v10.5.5 also includes all other improvements delivered in the Mac OS X 10.5.5 Update (client update).
Important: Information about products not manufactured by Apple is provided for information purposes only and does not constitute Apple’s recommendation or endorsement. Please contact the vendor for additional information.
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