This means that Apple has licensed the right to use the Unix(r) trademark, not that they have the right to use code from AT&T or its successors (USL, Novell, SCO, Caldera &c). It means that Apple will not be sued if they call macOS Unix, but it most assuredly did not use code from the SVR lineage.
This is the situation I was attempting to make light of. Apple is not what someone from 1990 would think of as a Unix vendor, but due to paying the licensing fee they are one and there are very few left.
