Editing Darwin (operating system) (section)

==License==
In July 2003, Apple released Darwin under version 2.0 of the [[Apple Public Source License]] (APSL), which the [[Free Software Foundation]] (FSF) classifies as a [[free software license]] incompatible with the [[GNU General Public License]].<ref>{{cite web|url=https://www.gnu.org/philosophy/apsl.html|title=FSF's Opinion of the Apple Public Source License (APSL) 2.0|access-date=July 22, 2016|archive-date=May 4, 2020|archive-url=https://web.archive.org/web/20200504151500/http://www.gnu.org/philosophy/apsl.html|url-status=live}}</ref> Previous versions were released under an earlier version of the APSL license, which did not meet the FSF definition of free software, although it did meet the requirements of the [[Open Source Definition]].<ref>{{cite web|url=https://www.gnu.org/philosophy/historical-apsl.html|title=The Problems with older versions of the Apple Public Source License (APSL)|access-date=July 22, 2016|archive-date=April 19, 2020|archive-url=https://web.archive.org/web/20200419054305/http://www.gnu.org/philosophy/historical-apsl.html|url-status=live}}</ref>