sudo port install automake libtool autogen autoconf
wget https://github.com/protocolbuffers/protobuf/archive/v3.14.0.tar.gz
tar -xzvf protobuf-3.14.0.tar.gz
cd protobuf-3.14.0
./autogen.sh
./configure
make
sudo make install
go install google.golang.org/protobuf/cmd/protoc-gen-go # run outside of project with module, add $GOBIN to $PATH