Allowing GP5 to access data from other applications

Gig Performer on Mac OS X
13

This is solved for now. I followed these steps:

  • Remove Gig Performer from Full Disk Access temporarily;
  • Launch Gig Performer and load MG3 again;
  • When the macOS prompt appears, allow access;
  • Re-add Gig Performer to Full Disk Access.

I should add that I didn’t allow the system to quit and reopen as I did previously. Maybe this is why it worked this time?

Anyway, success. FWIW, the app is codesigned as confirmed by terminal:
codesign -dv /Applications/MIDI\ Guitar\ 3.app

Thanks @dhj for your patience and assistance.