git clone --recursive https://github.com/qqaatw/win-calculator-on-apple.git

brew install cmake
# if you didn't select Xcode before, select the one you want to use.
sudo xcode-select -switch /Applications/Xcode.app

mkdir bulid && cd build
cmake .. -G Xcode  # generate Xcode project & configure compilers
cmake --build . --target Calculator  # build