MacOS

Apple Mac OS X is the operating system for Apple Macintosh computers on the PowerPC (PPC) and Intel x86 platform. The latest version of OS X is Snow Leopard, Build 10D571

Known versions

Mac OS X Developer Preview 2

Public Beta

Apple released to the public, on September 13, 2000, a "preview" version of Mac OS X (internally codenamed Kodiak) in order to gain feedback from users, which cost $29.95. The "PB" as it was known marked the first public availability of the Aqua interface and Apple made many changes to the UI based on customer feedback. Mac OS X Public Beta expired and ceased to function in Spring 2001