This won`t work, I`m afraid. The BC 9500 is not able to handle N.MUSIC/N.RADIO, because these commands are reserved to BC 9500`s A.TAPE2 and PHONO. You could connect the Beoport via a Beolink converter to the audio aux link socket, but this would not help.
If you have a have an Intel mac mini with IR receiver and apple remote, a Lintronic box -238 can help. Let the Lintronic box convert Beo commands, maybe in PC mode convert to apple commands and you can control the mac and your BC 9500 (but only in 1way mode).
Hope this helps.
Stefan