I believe it says "The BSD layer is based on the BSD kernel, primarily FreeBSD." It does not says the OSX kernel.
peep developer.apple.com if you really don't believe me ;-) it's a tad more reliable then wikipedia
cheers! ========================================================================== "A cat spends her life conflicted between a deep, passionate and profound desire for fish and an equally deep, passionate and profound desire to avoid getting wet. This is the defining metaphor of my life right now."
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