~/src/go-statsd-client> echo $GOPATH
/Users/me/gopath
~/src/go-statsd-client> echo $GOROOT
/usr/local/Cellar/go/1.1.1\\
~/src/go-statsd-client> go install
g
On OSX Mojave 10.14, go is typically installed at /usr/local/go.
Hence, setup these ENVs and you should be good to go.
export GOPATH=/usr/local/go && export GOBIN=/usr/local/go/bin
Also, add these to your bash_profile or zsh_profile if it works.
echo "export GOPATH=/usr/local/go && export GOBIN=/usr/local/go/bin" >> ~/.bash_profile && source ~/.bash_profile