I have BB 2015 for Mac and it will not recognize a Maj7 chord with a b5.
e.g. Cmaj7b5 can be played with a Cmaj7/Gb but it's not the bottom note I'm looking for.
I know BB2015 for Windows does recognize such a chord and I'm hopeful that an update for the Mac version may correct his. Thanks.

lan1,

I believe you've posted your message in the wrong location. You may get a better response posting in the Band-in-a-Box for Mac forum. Also, more information regarding which style and Realtrack (if any) may prove useful to someone responding to your post.

Thank you Jim.