How can I upgrade Docker on a Mac?
<p>I tried just 'docker-machine upgrade' and that did some work but I don't seem to have the latest CLI.</p>

<p>If I do 'docker version' I get:</p>

<pre><code>Client:
 Version:      1.8.2
 API version:  1.20
 Go version:   go1.4.2
 Git commit:   0a8c2e3
 Built:        Thu Sep 10 19:10:10 UTC 2015
 OS/Arch:      darwin/amd64

Server:
 Version:      1.11.2
 API version:  1.23
 Go version:   go1.5.4
 Git commit:   b9f10c9
 Built:        2016-06-01T21:20:08.558909126+00:00
 OS/Arch:      linux/amd64
</code></pre>

<p>I understand there are some new commands I'm not seeing so I suspect I don't have the latest software.</p>