Apple Mac OS X v.10.5 Leopard is the newest release of Apple's innovative, stable and compatible operating system for Macintosh computers. This new release includes an elegant new interface and over 300 new innovations designed to help customers accomplish any task. Improvements have been included for all your favorite Mac programs like iChat and Mail, as well as all-new features such as Quick Look, which lets you peruse the contents of a multiple-page document or video without opening the whole file, and Time Machine, which can recover files in seconds. OS X 10.5 has all this, as well as the exceptional search technology, stunning graphics, rapid connectivity and solid stability you've come to expect from the OSX family of operating systems. iChat now lets you present movies, presentations and virtually any document during your chtas with iChat Theater. You can even save your audio and video chats for sharing or synching with an iPod to play on the go. Communicate with 30 professionally designed stationary template, keep important notes and track to-do items in Mail You can now group applications into Spaces and move between each Space with keyboard shortcuts to organize your windows and reduce clutter

Apple Mac OS X Snow Leopard is an even more powerful and refined version of the world's most advanced operating system. In ways big and small, it gets faster, more reliable, and easier to use. New core technologies unleash the power of today's advanced hardware technology and prepare Mac OS X for future innovation. And Snow Leopard includes built-in support for the latest version of Microsoft Exchange Server, so you can use your Mac at home and at work. So upgrade from Mac OS X Leopard with Snow Leopard, a simpler, more powerful, and more refined version of Mac OS X. Out-of-the-box support for Microsoft Exchange - Snow Leopard includes out-of-the-box support for Microsoft Exchange Server 2007 in Mail, iCal, and Address Book, so it's easier than ever to take your Mac to work. Safari 4 - The latest version of the blazing-fast web browser delivers up to 50 percent faster JavaScript performance and is more resistant to crashes than ever. Universal Access - Every Mac comes standard with a wide range of assistive - or Universal Access - technologies that help people with disabilities experience what the Mac has to offer. Snow Leopard continues this support with a variety of innovative features that advance accessibility even further. System Requirements - Mac computer with an Intel processor, OS X 10.5, 1GB of memory, 5GB of available disk space, DVD drive for installation, Some features require a compatible Internet's service provider or Apple's MobileMe service (fees apply)