Broomstick bass problem

You are lucky then. Won’t run on newer mac OS. No wrapper will work either. Only way to make use of it on newer MAC OS is to:

Sample the whole thing on an older computer/OS and make a Falcon or Kontakt instrument out of it. = Lot of work and you still loose the interface.
Use two computers (one old/one new) and link them with either VST link or VEPro. The old can be either PC or MAC. The first requires two sound cards with digital in/out. Requires some money, but works perfectly. A little hazzle to set up.

The real “error” here is that Apple does not support Rosetta anymore, and older pluggs need that. And/Or that Bornemark don’t care or have the rights to develop Broomstick further.