update sphinx pages

Author: erdogant

docs/pages/doctrees/Installation.doctree

@@ -140,8 +140,14 @@ <h2>Graphviz<a class="headerlink" href="#graphviz" title="Permalink to this head
 <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">pip install graphviz</span>
 </pre></div>
 </div>
-<p>An alternative example how to download and install this for Unix machines:</p>
+<p>An alternative example is to download and install this for Unix machines:</p>
 <div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">sudo apt install python-pydot python-pydot-ng graphviz</span>
+<span class="gp"># </span>or
+<span class="go">sudo apt install graphviz</span>
+</pre></div>
+</div>
+<p>For Mac OS install it as following:</p>
+<div class="highlight-console notranslate"><div class="highlight"><pre><span></span><span class="go">brew install graphviz</span>
 </pre></div>
 </div>
 </section>

docs/pages/doctrees/environment.pickle

@@ -45,12 +45,20 @@ If you use the pip package manager, try the Python wrapper installed from Pypi.
 
     pip install graphviz
 
-An alternative example how to download and install this for Unix machines:
+An alternative example is to download and install this for Unix machines:
 
 .. code-block:: console
 
     sudo apt install python-pydot python-pydot-ng graphviz
-    
+    # or 
+    sudo apt install graphviz
+
+For Mac OS install it as following:
+
+.. code-block:: console
+
+    brew install graphviz
+
 
 Uninstalling
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