When I try to load version 1.3.1 of this mod, Minecraft Fabric opens but stays as a background process. It appears no one else has this issue.
I suspect that this mod is incompatible with macOS, but I can't confirm this.

Computer specs:
Model: iMac (Retina 5K, 27-inch, 2019)
Processor: 3 GHz 6-Core Intel Core i5
Graphics: Radeon Pro 570X 4 GB
Operating System: macOS Monterey 12.4 Beta
Game specs:
Fabric Version: 0.13.3 for Minecraft 1.16.5
Minecraft Version: 1.16.5

this exact same thing is happening to me on my macbook.