You can try http://abcplus.sourceforge.net/ for a Mac version.
EaysABC is written in Python, so you don't have to compile it, but it uses other programs to convert ABC to MIDI, PostScript or SVG, which have to be compiled for your system.
Apart from this you need several Python libraries.
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Is there an installer?Or do I have to compile it from source?
You can try http://abcplus.sourceforge.net/ for a Mac version.
EaysABC is written in Python, so you don't have to compile it, but it uses other programs to convert ABC to MIDI, PostScript or SVG, which have to be compiled for your system.
Apart from this you need several Python libraries.