Darwin is a BSD unix 9299
When they say the Xnu kernel is derived from FreeBSD 5.x, they mean the kernel in Free BSD 5.x is the source.
I'll buttume you asked that solely for ironic effect.
Then why does my quoted material use those words?
Darwin is a BSD unix 9301
Edwin The claim I used that against was substantially different from poo's "OS X is partially...
"The BSD portion of the kernel provides the POSIX API (BSD systemcalls), the process model, basic security policies, user ids, permissions, the networking code, the virtual filesystem code (including a filesystem independent journalling layer), cryptographic framework, System V IPC,and some of the locking primitives."
You keep asking others if they have troulbe reading, yet you're completely incapable of reading the above.
It's not "running alongside it," it's part of its basic structure. The Xnu kernel is not a Mach kernel, it is a hybrid of Mach and the BSD kernel. I've given you plenty of references to support that.
What you wrote above knocks down your analogy, unless you can demonstrate how a can of soda adds an operational level to a refrigerator.
You've gone from demanding a quote from a BSD authority to saying this crap. You must be getting desperate.
All you've got is "it's so because I say it's so, and anybody who disagrees doesn't know what they're talking about."