Problem using the Notation tool In Band in A Box.

I have tried installing the PGMUS.TTF font on my Mac in several ways. I have verified that the file is located in the proper folder on my hard drive. I have already called customer support. And yet, when I click on the Notation tool, I keep getting the error message:

Error: PGMUSIC F Regular (PGMUS.TTF) font not found. Notation will not display properly without this font

Has anybody been able to find a workable solution to this problem?