Well, I think my original problems were due to the fact that a previous install had forced Lilypond.app to rename itself to LilyPond 2.app.
I nuked the older version and reinstalled.
However, now I have a DIFFERENT problem.
I try to get LilyPond to process code from within JEdit and LilyPondTool, and I get this error:
Error running external command
See the activity log about the problem
Cannot run program "/Applications/LilyPond.app/Contents/Resources/bin/lilypond" (in directory "/Applications/LilyPond.app/Contents/Resources/bin"): error=13, Permission denied
I don't get this. I'm the only user of my MacBook, not counting a test account with almost no privileges I created.
If the main user doesn't have permission to use the program, what the hell is going on?
If you have any ideas, I'd appreciate hearing them.