I know all the workarounds if you have problems getting it started, most games require a few terminal commands to get running on Mac.
I have no experience with Mac but renpy provides what Should be a ready to go working build for Mac.
The thing is that the game uses live2d animations on scenes and the libraries need to be manually put into the build.
If youre willing to test it (hopefully just game download and feedback), then the Mac version of the demo should be ready to go.
Hit me up on discord if you want to try.