Ok I managed to get Lyrics from Realband to MacBB.
Just dragged the midi lyric track out as a mid then opened it in WinBB
saved it, it saved as an MGX renamed it to SGU and opened in MacBB,
so you would just mixdown your RB song to wav and have Song.SGU and Song.wav
and that should open and show Lyrics & Chords in MacBB.
Someone else might know an easier way.