Well, the truth is, I don't think it's fair to complain that Apple used BSD as the basis for its system, since that's the advantage of BSD (being able to really use the program for whatever you want, even sell it)
Yebo, iqiniso angicabangi ukuthi kulungile ukukhononda ngokuthi i-Apple isebenzise i-BSD njengesisekelo sohlelo lwayo, ngoba lokho kuyinzuzo ye-BSD (ukwazi ukusebenzisa lolu hlelo ngempela kunoma yini oyifunayo, noma ulithengise)