OS X Kernel Overview
Don Negro writes: "Found this on Apple's Developer site. A solid overview of the OS X kernel - what bits are Mach, what bits are BSD - and a good level a detail. This is the first installment. As they say in the introduction 'Only you can prevent kernel panics.'"
And if M$ ever put one of these out, It'd be called "Move Along, Nothing to see here..." or "All you ever wanted to know about world domination, but were afraid to ask"...
Shift happens. Fire it up.