Re: Linux v.s. Mac OS-X Performance - Mailing list pgsql-general

On Nov 27, 2007, at 8:36 PM, Gregory Stark wrote:

> I think (but I'm not sure) that the kernel in OSX comes from BSD.

Kind of.  Mach is still running underneath (and a lot of the app APIs
use it directly) but there is a BSD 'personality' above it which
(AIUI) is big parts of FreeBSD ported to run on Mach.  So when you use
the Unix APIs you're going through that.

-Doug