Install a particular version of Go on OS X. Assumes your Go versions are installed in ~/.go/versions. Setting your environment variables is up to you.

.goconfig

# Add Go related config here so you can source this file from ~/.bashrc
export GOPATH=$HOME/p/go
export PATH=$PATH:$GOPATH/bin
export GOROOT=~/.go/versions/go1.7beta1
export PATH=$GOROOT/bin:$PATH

install-go

#!/bin/bash
#
# Download and install a particular version of Go.
#
# Assumes versions are installed at ~/.go/versions/
#
# Author : Scott Barr
# Date   : 23 Apr 2016
#

if [ $# -ne 1 ]; then
    echo "Please supply Go version eg. go1.6.2"
    exit 1
fi

cd ~/.go/versions

version=$1

if [ -d ${version} ]; then
    echo "${version} already exists"
    exit 2
fi

filename=${version}.darwin-amd64.tar.gz
url=https://storage.googleapis.com/golang/${filename}

wget ${url}
tar -zxf ${filename}
mv go ${version}
rm ${filename}