Unix vs Mac OS X, Notable Difference I was searching Unix vs OS X. I found a notable difference at From < > OS X is a evolutionary kernel from the MACH and BSD linage. Can anyone help me understand this? * * * What are the notable differences between Unix and Mac OS X.

Regarding an explanation of the explanation:

See the FreeBSD forum. Basically the OS X userspace is essentially FreeBSD (with small elements of NetBSD) but the kernel itself is a fork of the MACH Kernel that makes it more monolithic in nature (like the network stack and process model are in line with FreeBSD). For a technical description, you'll probably have more luck googling "Darwin" than "OS X" since the latter has a lot of noise in it from people uninvolved with the project.