After the Download is complete, go ahead and launch the installer. The Go installer is shown in Figure 2.4:

Follow the onscreen prompts of the installer, and if the installer asks you to make Go available for all users on the system, make sure that you choose to install Go for all users of the system. You may also be prompted for your system credentials (so that you may install Go for all users on the system). Again, go ahead and provide your system credentials.

Once the installer is complete, you should get the following confirmation from the Go installer:

Once the installer is done, let's open up Command Prompt and inspect where the installer installed the files:

$ which go
/usr/local/go/bin/go

On a macOS system, the Go distribution gets installed to the /usr/local/go directory, and the binaries that come with the Go distribution are installed in the /usr/local/go/bin directory.

If you are new to the Go toolchain, you should use the go help command to get yourself acquainted with the various commands that come with Go:

$ go help
Go is a tool for managing Go source code.

Usage:

        go command [arguments]

The commands are:

        build      compile packages and dependencies
        clean      remove object files
        doc        show documentation for package or symbol
        env        print Go environment information
        bug        start a bug report
        fix        run go tool fix on packages
        fmt        run gofmt on package sources
        generate   generate Go files by processing source
        get        download and install packages and dependencies
        install    compile and install packages and dependencies
        list       list packages
        run        compile and run Go program
        test       test packages
        tool       run specified go tool
        version    print Go version
        vet        run go tool vet on packages

Use "go help [command]" for more information about a command.

Additional help topics:
        c           calling between Go and C
        buildmode   description of build modes
        filetype    file types
        gopath      GOPATH environment variable
        environment environment variables
        importpath  import path syntax
        packages    description of package lists
        testflag    description of testing flags
        testfunc    description of testing functions
Use "go help [topic]" for more information about that topic.

To ascertain the version of Go installed on your system, you can use the go version command:

$ go version
go version go1.9.1 darwin/amd64