I wish there was a way to TIGHTLY midi sync BM3 roll midi with Ableton on the mac. Essentially, a BM3 bank would be able to replace the Push. While sync is possible with Ableton Link, the lag that comes with wireless is insane and some link behaviors are unfit for this particular use-case. The best solution would be to send midi and sync over usb to the computer.
On the Mac, when I connect the 11" iPad pro via usbc, I can use it as a midi and audio interface with the mac, but BM3 has no way to make read or send tempo it seems.