Mac OS X Snow Leopard features hundreds of refinements, new core technologies out-of-the-box support for Microsoft Exchange and new accessibility features. Snow Leopard will ship as an upgrade for Mac OS X Leopard users in September 2009 for $29.
For the first time, system applications including Finder, Mail, iCal, iChat and Safari are 64-bit, and Snow Leopard's support for 64-bit processors makes use of large amounts of RAM, increases performance and improves security while remaining compatible with 32-bit applications. Grand Central Dispatch (GCD) provides a new way for software to take advantage of multicore processors. GCD is integrated throughout Snow Leopard, from new system-wide APIs to high-level frameworks and programming-language extensions, improving responsiveness across the system. OpenCL, a C-based open standard, allows developers to tap the power of the graphics processing unit for tasks that go beyond graphics.
Snow Leopard builds support for Microsoft Exchange Server 2007 right into Mac OS X Mail, Address Book and iCal so you can use these applications to send and receive e-mail, create and respond to meeting invitations, and search and manage your contacts with global address lists. Exchange information works seamlessly within Snow Leopard so users can take advantage of OS X only features such as fast Spotligh™ searches and Quick Look previews.
Mac OS X V. 10.6 Snow Leopard will be available as an upgrade to Mac OS X V. 10.5 Leopard in September 2009 through the Apple Store, Apple's retail stores and Apple Authorized Resellers. The Snow Leopard single-user license will be available for a suggested retail price of $29 (U.S.) and the Snow Leopard Family Pack, a single household, five-user license, will be available for a suggested price of $49 (U.S.). For Tiger users with an Intel-based Mac, the Mac Box Set includes Mac OS X Snow Leopard, iLife '09 and iWork '09, and will be available for a suggested price of $169 (U.S.) and a Family Pack is available for a suggested price of $229 (U.S.).