you are granted a limited non-exclusive license to install, use and run one (1) copy of the Apple Software on a single Apple-branded computer at a time.It is not entirely clear which license is offered with the retail version of Snow Leopard.
Single-user licenses and "family pack" licenses for up to five computers are available.
For qualifying Mac computers bought after June 8, 2009, Apple offered a discounted price through their "up-to-date" program provided that customers' orders were faxed or postmarked by December 26, 2009.
and the installation discs provided through this program are clearly marked as upgrades unlike either of the retail editions.
Mac OS X Snow Leopard is intended to be a release aimed to refine the existing feature set, expand the technological capabilities of the operating system, and improve application efficiency.
Note: To install or upgrade other versions of OS X, see ARCHIVED: How do I install OS X 10.9 (Mavericks)?
, ARCHIVED: How do I install OS X 10.8 (Mountain Lion)? Before attempting to install or upgrade Mac OS X, verify that your computer meets the minimum system requirements. If you follow these steps, the installer will replace your operating system if one is already present, but will preserve your account information and personal files.Snow Leopard was succeeded by Mac OS X Lion (version 10.7) on July 20, 2011.For some time on, Apple continued to sell Snow Leopard from its online store for the benefit of users that required Snow Leopard in order to upgrade to later versions of OS X, which have all been distributed through the Mac App Store introduced in the Snow Leopard 10.6.6 update. Although Snow Leopard has been officially out of support since 2014, it remains available for purchase both on Apple's App Store, and in the form of boxed DVD-ROMs available through Apple's online store.Make sure you've backed up your documents, music, pictures, movies, and other personal files before you proceed.Mac OS X Snow Leopard (version 10.6) is the seventh major release of Mac OS X (now named mac OS), Apple's desktop and server operating system for Macintosh computers.Despite significant changes in the software, users will experience almost no changes in the user interface.