Darwin is an open-source Unix operating system first released by Apple Inc. in 2000. It is composed of code derived from NeXTSTEP, BSD, Mach, and other free software projects' code, as well as code developed by Apple.

Quick facts: Developer, Written in, OS family, Working sta...
DeveloperApple Inc.
Written inC, C++, Objective-C, assembly language
OS familyUnix,[1][2] BSD[3]
Working stateCurrent
Source modelOpen source
Initial releaseNovember 15, 2000; 22 years ago (2000-11-15)
Latest release21.5.0 / March 18, 2022; 8 months ago (2022-03-18)
PlatformsCurrent: x86-64, 64-bit ARM, 32-bit ARM (32-bit ARM support is closed-source)
Historical: PowerPC (32-bit and 64-bit), IA-32
Kernel typeHybrid
user interface
Command-line interface (Unix shell)
LicenseMostly Apple Public Source License (APSL), with closed-source drivers[4]
Official websiteopensource.apple.com

Darwin forms the Unix-based core set of components upon which macOS (previously OS X and Mac OS X), iOS, watchOS, tvOS, iPadOS and bridgeOS are based. It is mostly POSIX-compatible, but has never, by itself, been certified as compatible with any version of POSIX. Starting with Leopard, macOS has been certified as compatible with the Single UNIX Specification version 3 (SUSv3).[5][6][7]

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