[glorgau]

OS X is incredibly slow by design in part because of the hybrid XNU kernel it uses. It is based on the Mach Microkernel (see Linus vs. Tanenbaum) and the excellent Berkeley Standard Distribution (BSD) kernel. The hybrid kernel is very inefficient and less stable than alternatives such as the Linux kernel and the BSD kernel found in FreeBSD.

How true. But, the main advocate for Mach was Avie Tevanian, and he has "left to spend more time with his family".

[antiRepublicrat]

How true. But, the main advocate for Mach was Avie Tevanian, and he has "left to spend more time with his family".

I have a feeling that the reason for going with Mach was to make Apple's "Just in Case" switch to Intel easier. We may even see Mach getting dumped in the future.