The various Berkeley Software Distribution operating systems, having been nearly destroyed in an ugly lawsuit with AT&T, have had a challenging past. FreeBSD has been the only non-commercial Berkeley unix to have had any measure of real success and, to this day, the hangover of its early legal woes still stymies its popular use outside of industry despite improvements to its codebase.
The infamous AT&T/BSD lawsuits caused FreeBSD to jettison two-thirds of its codebase and start over from scratch, knocking its feature-set back several years, causing it to be bought out and divested by hopeful investors and only reaching robustness with code infusions from two commercial unix systems, BSD/OS and Mac OS X.
So as FreeBSD heads toward its milestone tenth release, it is Apple's platform that has been the center of gravity for the demonic operating system, largely in part by Apple's open-source efforts that have been more and more contributing code back into the main FreeBSD development branch. It obviously won't be long until the two are completely merged—so when thinking of 2014 and FreeBSD 10, starting thinking “FreeBSD X.”
But first, how did we get here? What did BSD/OS contribute or, more importantly, how did it take away from FreeBSD? And what exactly does FreeBSD 10 look like? What is Apple's role in the operating system? Important questions to be answered, picking up from after the lawsuits…