macOS

macOS is a series of proprietary graphical user interface operating systems developed and marketed by Apple Inc. since 2001. It is the primary operating system for Apple's Macintosh computers. Within the market of desktop and laptop computers, it is the second most widely used desktop OS, after Microsoft Windows and ahead of ChromeOS.

The system is built on a Unix foundation and is based on the Darwin OS open-source project. Its core architecture utilizes the XNU Kernel, which combines the Mach Microkernel and FreeBSD components. Historically, macOS was derived from NeXTSTEP, the operating system developed at Steve Jobs's company NeXT before Apple acquired it in 1997.

Modern iterations of the software, such as macOS Sonoma, are heavily optimized for Apple Silicon, including the M1 Chip, M2 Chip, and M3 Chip. This transition from Intel processors has enabled features like the Neural Engine for machine learning tasks and native support for iOS and iPadOS applications. Key system features include the Finder, Spotlight, Mission-Control, and Time Machine for backups.

Detailed technical documentation and release notes can be found at the Apple Developer Portal and comprehensive history is available via Wikipedia.

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