We actually had an Intel build of most of OSX from the beginning. Various parts would go stale and then a motivated engineer would dive in and get it running ag

We actually had an Intel build of most of OSX from the beginning. Various parts would go stale and then a motivated engineer would dive in and get it running again on some specific set of audio and video hardware. At some point the existence of the "Marklar" project leaked out, but several of us at Apple had various builds running on commodity PC hardware.