I am thinking it is time to move from MacOS High Sierra to Mojave. System information for LilyPond 2.18.2-1 says it is not a 64-bit application, which I understand can be a problem for Mojave.
If you have experience using LilyPond 2.18.2-1 (current stable version for MacOS) on MacOS 10.14 Mojave, I would appreciate your sharing if it was transparent or not.
I just installed the MacOSX 2.18.2-1 version from
lilypond.org on Mojave and it seems to be working just fine (at least on a trivial example).
I also tried Frescobaldi and it works just fine as well.
Cheers,