Mac operating systems were developed by Apple in a succession of two major series. In 1984, Apple debuted the operating system …

Jul 7, 2026 · In this article, we guide you through the evolution of Apple’s operating system, from its first public release in 2001 to the …

macOS (previously OS X and originally Mac OS X) is a proprietary Unix [9][10] operating system, derived from OPENSTEP for Mach …

Jun 10, 2026 · Explore every Mac OS X and macOS release from Cheetah to macOS 27 Golden Gate. Find release dates, …

Aug 8, 2026 · A complete macOS versions history from Mac OS X 10.0 Cheetah to macOS Tahoe 26. Includes release dates, key …

1 day ago · Learn which Mac operating system (macOS) is installed on your Mac, and whether it's the latest (newest, most recent) …

Sep 30, 2025 · This comprehensive guide documents all 32 major Mac operating system versions released since 2001, including the …

Mar 4, 2026 · Use any of these methods to download and install current or previous versions of the Mac operating system on …

Apr 28, 2026 · macOS is built on a layered architecture that combines a powerful kernel with advanced frameworks for graphics, …

Jan 21, 2025 · This complete macOS versions list includes every release in order, from Mac OS X Cheetah (2001) to the latest …