What is Mac OS X and types of Mac OS X operating system?
Mac OS X is an operating system released by Apple Inc. It is
designed for Apple branded computers, which is why you will never
see a Dell, or an HP computer run Mac OS X. There are only two
important versions of Mac OS X, Mac OS X Server, and regular Mac OS
X. Mac OS X server was designed for servers, while regular Mac OS X
was designed for most computers. The current version of Mac OS X
(10.6) is named Snow Leopard.