Mac
はい
$ wget https://storage.googleapis.com/golang/go1.4.3.darwin-amd64.tar.gz
$ tar zxf go1.4.3.darwin-amd64.tar.gz
$ mv go ~/go1.4
$ rm go1.4.3.darwin-amd64.tar.gz
はい
$ git clone https://github.com/golang/go ~/src/github.com/golang/go
$ cd ~/src/github.com/golang/go/src
$ ./make.bash
はい
$ export GOROOT="$HOME/src/github.com/golang/go"
$ export GOPATH="$HOME"
$ export PATH="$GOROOT/bin:$PATH"
はい
$ go version
go version devel +391805b Tue Feb 17 23:17:12 2015 +0000 darwin/amd64
