Install build dependencies node and zig via brew, clone the repository, build and run the app:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
brew install node zig
git clone https://github.com/monsterkodi/kalk.git
cd ./kalk/kalk.app
./kk -bkr