As far as developers are concerned, the integration of Grand Central, OpenCL and a 64 bit kernel will allow you to take full advantage of the dual processing power of Intel Macs. If your Mac is operating at a slow pace, then for that reason alone it is worth the upgrade to OS X 10.6 Snow Leopard.

Faster Installation Time: Installing Snow Leopard on multiple machines takes approx 15 minutes in comparison to around an hour for Leopard.

Microsoft Exchange Server Support: Mac users can now connect to Microsoft Exchange 2007 servers via Mail, Address Book, and iCal.

Safari Beta 4 Default Browser: Apple included a beta version of Safari 4 with Snow Leopard.

I say surprising because it seems development work is a little infrequent and there are some features left to be desired, but it certainly works and the frame rate is pretty high on my MacBook.

Cocoa Based Finder: Finder has a new Cocoa Desktop Window and Contextual Menu. Looking for a PS2 Emulator for Mac OS X Look no further then PCSX2, a full blown PS2 emulator for Mac OS X that works surprisingly well.

Slimmer QuickTime Player: QuickTime X features a simplified GUI with a greater focus on codec support.

This version of Apple's OS also has a reduced footprint. This update does not have stacks of new features, rather overall improvements and efficiency upgrades. Mac OS X 10.6.8 Snow Leopard is an upgrade to the previous version of OS X Leopard.

Mac os x cheetah emulator for mac