May I recommend you NOT down-convert them? Just play the music 24/96 through your mac using Audirvana or any other music player of yr choice. The difference between 24/96-192 & 16/44.1 is not subtle.
If you must, then most media players will do it for you; if at all possible, try converting the sample rate first and then do the dithering. Good luck!
If you must, then most media players will do it for you; if at all possible, try converting the sample rate first and then do the dithering. Good luck!