>> I cannot find a binary package for arm64 and macOS 11 on the >> official website. I don't know how to compile this software on my >> platform. > > Install macports > > https://www.macports.org/install.php > > then say > > sudo port install lilypond > > on the command line.
If you prefer Homebrew, it works quite the same: Install Homebrew https://brew.sh/ then say brew install --cask lilypond Werner