Latest updated is recommended for Mac OS X 10.5 Leopard and includes general operating system fixes that enhance the stability, compatibility and security of your Mac and also is coming with new features.
The most notable features and fixes are:
* Latest security fixes.
* Additional RAW image support for several third-party cameras.
* Improves the reliability and accuracy of Unit Converter, Stocks, Weather and Movies Dashboard widgets.
* Addresses a situation that may cause issues when logging into Gmail.
* Improves performance of video playback and cursor movements for recent Macs with NVIDIA graphics.
* Fix an issue with Dvorak keyboard layout in Mac OS X 10.5.6.
* Improves reliability when syncing contacts with Yahoo!.
* Improves stability for network home directories hosted by Mac OS X Server v10.4.
* Improves Finder search results for network volumes that may not support Spotlight searching, such as Mac OS X Server v10.4, Time Capsule, and third-party AFP servers.
* Several improvements to Directory Service and Client Management.
* Expansion Slot Utility for Mac Pro now reports the correct PCIe slot configuration.
* Improves network performance when connected to certain Ethernet switches that have Flow Control enabled.
* Fix an issue in which time limits may not work properly with full-screen games and Fast User Switching.
* Improves consistency with Parental Controls and application restrictions.
* Includes other printing reliability and stability improvements.