Originally Posted By: CrvsCrx
Purchase a Windows machine, then buy the BIAB/RB for Windows 2021.
That is my guess.
Just sayin'.

Dual Boot, put another hard drive in your Mac, install Win10, get a product key off eBay for new install only, very cheap.
Do a crossgrade of the main app only or buy 2021 app only, both come with RealBand, you can batch convert the aif/m4a to wav/wma and use all your existing RT RD.
Just rename both "LibraryM" folders in RealTracks and RealTracks\DirectInput to "Library".
ReaTrak Biab & Plugin in Reaper
Free Biab Chord Picker Tool