The developers have a fix for the music for 1.2, Lunar confirmed that. The reason a lot of the music doesn’t work is that they’re .mid files which doesn’t work too well with mac, so some guy converted all of those files to .wav, however, .wav is a very large file size, so you’re gonna have to sacrifice about 700 MB to listen to music for a game that’s normally around 300 MB.
I’m basically quoting lunar from this topic, and the .wav files can be found here along with more instructions.
tl;dr: 1.2 will have music that works for sure, if you want a temporary fix that has a huge file size go to that link above ^^