Re: lilypond does not work with Mac OS 10.15 (Catalina)

[Eric Benson]

I was able to build Lilypond on Catalina, using the newest Xcode. MacPorts
does not yet have a distribution for Catalina, so I built it from source as
well. It seems to work fine. I did have to make one change to the Portfile
for lilypond-devel. I added macports-gcc-9 at the top of the
compiler.fallback-append list, because MacPorts was mistakenly trying and
failing to build gcc8 as a dependency. I know there is a
political controversy about the GNU License and the latest Xcode, but there
don't seem to be any technical challenges to building from source on the
current Mac OS and Xcode.

I'm using a 64-bit-compiled Lilypond 2.19.83 on Catalina now.