This explains a lot. Some things run in 32 bit, some in 64 bit. It
all depends.
http://www.ahatfullofsky.comuv.com/English/Programs/SMS/SMS.html
"There is a lot of confusion about the fact that Snow Leopard starts
by default with a 32-bit kernel even though nearly everything else is
64-bit (according to Apple all system applications except DVD Player,
Front Row, Grapher, and iTunes have been rewritten in 64-bit)."
"Snow Leopard is 64-bit for all users with a 64-bit CPU. The
applications are, the memory space is. The ONLY THING that doesn't
load into 64-bit - ON PURPOSE - is the kernel!"
"The problem is compatibility with third-party drivers. Some programs
are so deeply intertwined with the OS that they reach deeply into its
bowels and modify its core, the kernel - these drivers are called
kernel extensions (or kext)."
BTW, the new Mac OS ships this Friday.
M$'s Vista replacement is still way out there in the future.
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