I was reading a post on rixstep a couple of days ago, and the gist of it was the following: "Why is Apple insisting on using a hybrid kernel of it's own design by mushing together Mach and FreeBSD, ...

Disagreements exist about whether or not microkernels are good. It's easy to get the impression they're good because they were proposed as a refinement after monolithic kernels. Microkernels are ...