Snow Leopard is the successor to Apple’s immensely successful Mac OS X Leopard. At first glance Snow Leopard does not seem to have anything new, the programs are subtly faster but no changes that are overly dramatic. Before its release Apple stated that the new OS would work better with existing hardware and that it is adding new UI enhancements to make day to day usage of the operating system to flow smoothly.
In order to find out how well the new enhancements work you need to look a little deeper and compare it directly with the old OS. When you compare the two Operating Systems head to head you realize how much faster Snow Leopard is. As for the UI there are five major changes. Icons can be scaled. There is a little slider at the bottom right hand corner of the screen that allows users to change the size of the icons in a window, and this means that video files can be played directly in the finder window. The Dock has gotten an addition too. By pressing and holding an icon on the dock, users can select which window of the application they want to open. Expose has also been improved as well, when viewing all the windows in an application, they are now arranged in a grid and have text labels beneath them. Stacks has been improved by allowing scrolling in the grid view and a smart list view that shows numerous files at once. Even QuickTime has been improved and it even has a new capture system for encoding audio and video clips and voice annotated screen capture sessions.
The end result is that Snow Leopard is a big improvement, boosting performance and incorporating many UI tweaks, driving it closer to being a perfect OS.