Useful Mac OS X Terms: What is Darwin?

This document explains what Darwin is.
This article has been archived and is no longer updated by Apple.
Beneath the appealing, easy-to-use interface of Mac OS X is a rock-solid foundation that is engineered for stability, reliability, and performance. This foundation is a core operating system commonly known as Darwin. Darwin integrates a number of technologies, most importantly Mach 3.0, operating-system services based on 4.4 BSD (Berkeley Software Distribution), high-performance networking facilities, and support for multiple integrated file systems.

Darwin 1.4.1 is the UNIX-based, open-source foundation of Mac OS X. It is based on FreeBSD and Mach 3.0 technologies and provides protected memory and pre-emptive multitasking. This release corresponds to the release of Mac OS X 10.1.

Published Date: Oct 11, 2016