Darwin (operating system)

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Darwin is the core Unix operating system of macOS (previously OS X and Mac OS X), iOS, watchOS, tvOS, iPadOS, visionOS, and bridgeOS. It previously existed as an independent open-source 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 modelcurrently open source with proprietary components[citation needed], previously open source
Initial releaseNovember 15, 2000; 22 years ago (2000-11-15)
Latest release23.1.0 / October 25, 2023; 19 days ago (2023-10-25)
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 (XNU)
user interface
Command-line interface (Unix shell)
LicenseMostly Apple Public Source License (APSL), with closed-source drivers[4]
Official websiteopensource.apple.com

Darwin 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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