Why has BiaB for Mac no audio support, while Windows version does?

The most difficult job is to import a file music file, recognize chords, etc.
This is done fine in Windows and in Mac.

But you can only playback that imported audio song (mp3, etc.) with Windows version, not with Mac version!!!

I saw this feature on a friend's Window version. I liked it and so for this MAIN reason I bought the Mac version.
Tried to do the same, but didn't figure out how.
I put a support request and the answer was:
Unfortunately the Band-in-a-Box for Mac does not have an audio track so you cannot listen through Band-in-a-Box at the same time. What I would suggest is opening I Tunes and playing the song through there.
Using iTunes, means no synchronization and no integrated features (start, stop, rewind, etc.)

Now my question is will this feature be supported on next Mac 2010 version?

If not, I'll have to return my BiaB.

I think this feature is very useful to learn existing songs with audio & chords simultaneously.

Best regards.

Dany