mkdir git
cd git
git clone https://github.com/Ryujinx/Ryujinx
cd Ryujinx
dotnet build -c Release -o build
./distribution/macos/create_macos_build.sh ./ ./distribution/macos/temp ./distribution/macos/output ./distribution/macos/entitlements.xml 1.1.1 0 Release ""
Move the git/Ryujinx/distribution/macos/output/Ryujinx.app into your Applicationd directory and run it.