>Вот, собственно, ссылка на исходники:
>http://developer.apple.com/opensource/index.html во первых это не весь код от ядра MacOS X, а только его открытая часть
(например, там нет проверки железа от apple при запуске ОС :-)))
да, darwin - открыт, но, например, его исходников для платформы ARM нет (и не будет):
http://en.wikipedia.org/wiki/Darwin_(operating_system)
Up to Darwin 8.0, Apple released a binary installer (as an ISO image) after each major Mac OS X release that allowed one to install Darwin on PowerPC and Intel x86 computers as a standalone operating system. Minor updates were released as packages that were installed separately. Darwin is now only available as source code,[1] except for the ARM variant, which has not been released in any form separately from iPhone OS.