And no drivers are available in the system prefs.
I've been to that link and others like it. I think you're probably right. I searched for drivers but only found them for windows, and apple web pages say the mouse is compatible, but no details on...
I've had no other problems with ithe mouse in Finale or .other programs. And I just tried a different Microsoft mouse and it acts the same.
Happens in all documents, old or new. Happens for all metatools I've tried--, dynamics, articulations, and keyboard shortcuts that use the mouse, like pressing "<" and drawing a cresc, don't work. ...