People familiar with the latest build, dubbed 10C519f, said the update addresses nearly 150 "general focus areas" ranging from applications like Address Book, Photo Booth and QuickTime Player to core services including Front Row, Spaces, and Time Machine.
The update also specifically targets WWAN support for mobile data services and enhances Exchange support, MobileMe and iDisk features, as well as NTFS and WebDAV file system support.
The new beta also addresses specific issues related to the app switching in the Dock, performance and stability issues tied to graphics drivers and the OpenCL compiler, as well as patches impacting bugs in Parental Controls Preview, printing, and the software update mechanism itself.
Friday's release is the second version of Mac OS X 10.6.2 that has been exposed to Apple's third party developers, and comes hot on the heels of the previous beta released on Monday. It will eventually be released to users as the second free maintenance update for Snow Leopard.
Released just days after the launch of Snow Leopard, Mac OS X 10.6.1 addressed printer issues, updated the Adobe Flash Player plug-in, and resolved issues with the Mail application, among other fixes.