Create a file called @code{lilypond} which contains
@example
-exec @var{path/to}/LilyPond.app/Contents/Resources/bin/lilypond "$@"
+exec @var{path/to}/LilyPond.app/Contents/Resources/bin/lilypond "$@@"
@end example
Create similar files @code{lilypond-book}, @code{convert-ly}, and