I have to keep nitpicking at every article that mentions Mac OS X’s history:
One of the key factors that led to the portability of bhyve to OSX is that the darwin kernel is loosely based upon the original kernel that powers FreeBSD (family tree from wikipedia here),
Not quite! It’s a descendent of the (NeXT variation of the) Mach kernel; ~4.2BSD grafted on is used for the Unix side of it. Around the time of OS X, a massive refactoring was done to modernize the kernel by importing from the modern *BSDs, mostly in userland.
And worth bringing up since its hybrid approach is really weird vs a common BSD or Linux distro. People who start with FreeBSD in their mind to then explore Darwin internals might be a bit confused. ;)
I have to keep nitpicking at every article that mentions Mac OS X’s history:
Not quite! It’s a descendent of the (NeXT variation of the) Mach kernel; ~4.2BSD grafted on is used for the Unix side of it. Around the time of OS X, a massive refactoring was done to modernize the kernel by importing from the modern *BSDs, mostly in userland.
And worth bringing up since its hybrid approach is really weird vs a common BSD or Linux distro. People who start with FreeBSD in their mind to then explore Darwin internals might be a bit confused. ;)