> Being a properly free and unrestricted environment to work with and work in is not
So why didn't you say that? You said "I was referring to Linux as a proper, unrestricted Unix-environment"
To be pedantic, Linux is the kernel. The environment, is the GNU userland, which is specifically NOT UNIX.
Yes I know it's Unix-like. But when you start your complaint with "it's not proper" try to at least know what you want it to be and what you don't want.
OS X is a "proper UNIX" operating system.
GNU/Linux distributions are free unix-like operating systems.