BIAB Mac 2023 Build 704
MacOS Ventura 13.3.1

I do open special to open a file in ABC notation format, and I am allowed to select and OK file speed.abc, but there is no visible/audible result back in the application. Using paste special on clipboard contents is similarly ineffective.

This is a longstanding problem.

Here is the ABC code, which plays fine in EasyABC:

Code:
X:1
T:Speed the Plough
M:4/4
C:Trad.
K:G
|:GABc dedB|dedB dedB|c2ec B2dB|c2A2 A2BA|
  GABc dedB|dedB dedB|c2ec B2dB|A2F2 G4:|
|:g2gf gdBd|g2f2 e2d2|c2ec B2dB|c2A2 A2df|
  g2gf g2Bd|g2f2 e2d2|c2ec B2dB|A2F2 G4:|