I don't think that was it. Jobs wouldn't tolerate any other UNIX at Apple except NeXTSTEP. He killed A/UX while still in negotiations for Apple to purchase NeXT

I don't think that was it. Jobs wouldn't tolerate any other UNIX at Apple except NeXTSTEP. He killed A/UX while still in negotiations for Apple to purchase NeXT. I don't even think Apple worked on those versions of AIX. IBM likely provided it under contract. ANS only ever ran AIX and NetBSD.