3 ms·BSD userland. The kernel is a Mach-derived kernel called XNU.by peatmoss 10y agoBSD userland. The kernel is a Mach-derived kernel called XNU.glhaynes 10y agoXNU combines a BSD-like kernel (providing POSIXish services) with Mach. The BSD portion of the kernel runs in supervisor mode like the Mach portion.peatmoss 10y agoOh interesting--I didn't realize that was the case. I guess it is correct to call the kernel BSD in that sense!