title: installing latest tcl/tk version
body: <p>I am trying to install tcl/tk 8.5.11 on MacOSX. However, it is not being recognized; the old version 8.5.7 is showing up.
  I have a separate folder on my desktop I am unzipping the files into.</p>
  
  <p>I follow the instructions on the Tcl site (to the best of my ability).</p>
  
  <p>I do:<br>
  "<code>% info patchlevel</code>"<br>
  and it gives:<br>
  "<code>8.5.7</code>"</p>
  
  <p>which is what I don't want. The reason I want this new version is that I need it to be unthreaded. Whatever is currently there is threaded.
  Can anyone offer ideas on how I get the new version to be recognized?</p>