 <a href="https://www.xquartz.org/" class="external-link uri">https://www.xquartz.org/</a>. This page is also linked from the <a href="https://cran.r-project.org/bin/macosx/" class="external-link">Download R for (Mac) OS X</a> page.</p>
<p>If you want to apply non-rigid registrations calculated by the Computational Morphometry Toolkit (CMTK) you will need to install that separately – see section <em>External Dependencies</em> below.</p>
</div>
<div class="section level1">
<h1 id="basic-installation">Basic