Click on that Software Update in the Apple menu to download the latest bunch of fixes.
Apple released Mac OS X 10.6.3 in both client and servers versions Monday, offering a number of bug fixes, tweaks, and performance improvements. The updates include a number of security fixes, which are being rolled out to Leopard users as Security Update 2010-002.
This third update to Snow Leopard will bring overall improvements to printing, wireless networking, OpenGL-based apps, QuickTime X, certain third-party external USB devices, and of course, photo screen savers. Some other specific fixes that caught our eye include improved secure WiFi connections, working with remote Windows/SMB file servers, Exchange support, mobile account stability, better iDisk sync, and Time Machine backups to a Time Capsule, especially over WiFi. There’s also specific fixes for sleep/wake issues when connected to WiFi and problematic iSight pixels for the latest iMac models. Some improvements for pro users include fixes for Xsan and Fibre Channel connections and better performance for 64-bit Logic Pro 9 and Main Stage 2.
On the Server side, the updates include a total of 69 patches for security related issues, though many apply only to server-related components such as Wiki Server, Apache, and iChat Server. A number of patches are also included for the many underlying UNIX or open source components included in Mac OS X, such as PHP, MySQL, perl, curl, CUPS, SMB, and Ruby. There are nine separate QuickTime fixes for possible problems with “maliciously crafted” movie files, and a number of fixes to CoreImage and ImageIO for similar malicious still images. Several Mac OS X system components were patched, as well as ClamAV and firewall software. Those still running Mac OS X 10.5.x get all these security-related fixes in a Security Update.