I think its more the case that OSX hasn't really had SMP/numa for a long time. My understanding was the the dustbin was designed with one big processor because

I think its more the case that OSX hasn't really had SMP/numa for a long time. My understanding was the the dustbin was designed with one big processor because SMP/numa was a massive pain in the arse for the kernel devs at the time so it was easier to just drop it and not worry.