FYI. It’s 64-bit, as the new Mac OS requires. There is also the BIAB VST Plugin, with its own new forum. The add-ons bring it comparable to the Windows 2019 version (except for RealBand).
BIAB 2021 Win Audiophile & Mac UltraPak. Software: Studio One 5 Pro, Adobe Audition CC, Notion 6; Win 10 64 Pro. Hardware: custom i7 16 Gb; Roland Integra-7, Presonus Studio 192, Presonus Faderport 8, Royer 121, Adam Sub8 & A5X monitors