@juandesant @dataandpolitics @glennf

1. The kernel (#xnu) was amalgamation of code that was mostly independent of NeXT. #NeXTSTEP was based on Mach 2.5 & 4.3BSD with an ObjC based DriverKit. xnu was built from #osfmk which was Mach 3.0 and ported to Mac HW as part of the #MkLinux project, a fresh rebase of 4.4BSD-Lites2, and the driver system (#IOKit) was a ground up redesign, despite the existence of DriverKit and NuIO.

2/7