Applescript: Signature syntax is broken after update to OS X Sierra
<p>Since upgrading to Mac OS X Sierra, the following AppleScript does not work for adding a signature to an e-mail in Apple Mail. </p>

<p>I haven't yet found a workaround, so thought I might quiz the group.</p>

<p><strong>No longer working:</strong></p>

<pre><code>set message signature of msg to signature theSignatureName
</code></pre>