$ brew install go ==> Downloading https://homebrew.bintray.com/bottles/go-1.9.4.high_sierra.bottle.tar.gz ######################################################################## 100.0% ==> Pouring go-1.9.4.high_sierra.bottle.tar.gz ==> Caveats A valid GOPATH is required to use the `go get` command. If $GOPATH is not specified, $HOME/go will be used by default: https://golang.org/doc/code.html#GOP