Editing MkLinux (section)

===Legacy===
MkLinux is the first official attempt by Apple to support a [[free and open-source software]] project.<ref name="MkLinuxApple"/> The work done with the [[Mach (kernel)|Mach]] 3.0 kernel in MkLinux is said to have been extremely helpful in the initial porting of NeXTSTEP to the Macintosh hardware platform, which would later become macOS.<ref name="AppleKernelProgrammingGuide"/>

{{Quote|OS X is based on the Mach 3.0 microkernel, designed by [[Carnegie Mellon University]], and later adapted to the Power Macintosh by Apple and the Open Software Foundation Research Institute (now part of Silicomp). This was known as <code>osfmk</code>, and was part of MkLinux (http://www.mklinux.org). Later, this and code from OSF’s commercial development efforts were incorporated into Darwin’s kernel. Throughout this evolutionary process, the Mach APIs used in OS X diverged in many ways from the original CMU Mach 3 APIs.

You may find older versions of the Mach source code interesting, both to satisfy historical curiosity and to avoid remaking mistakes made in earlier implementations.|Apple, Inc.|Kernel Programming Guide: Mach API Reference<ref name="AppleKernelProgrammingGuide"/>}}