I did a Crossgrade from Win to Mac, as I had the Win Audiophile (wav) version, as Mac BB will load wav I just did the Mac app Crossgrade.
I had to rename bb\RealTracks\Library to LibraryM and bb\RealTracks\Direct Input\Library to LibraryM
I had to set default media player to MediaPlayerX.app to play the demo styles/realtracks/drums wma files in the picker windows.
It's a bit of messing around so if you're not into all of that there's Great upgrade/crossgrade special

**Special Offers Available Until October 31, 2016!**
http://www.pgmusic.com/bbmac.packages.htm

I used https://jstuff.wordpress.com/jbridgem/
I don't think there is a PG integrated version for it yet as like JBridge for WinBB (so wait for that it makes it easier to use and it's only $10),
it works in Mac OS X 10.6 to Mac OS X 10.10 only currently. Support for OS X El Capitan (10.11) is being implemented in the jBridgeM v0.94Beta.

* In Finder > User > click the Gear options > Show View Options > check Show Library Folder

I'm using it in 10.9 and Amplitube 4 64 bit seems to work fine in Band-in-a-Box 2016 Build 143 Update using JBridgeM.