srijeet0406 commented on a change in pull request #4697:
URL: https://github.com/apache/trafficcontrol/pull/4697#discussion_r427447394



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File path: docs/source/development/traffic_portal.rst
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@@ -44,6 +44,32 @@ Installing The Traffic Portal Developer Environment
 #. Navigate to the ``traffic_portal`` subdirectory of your cloned repository.
 #. Run ``npm install`` to install application dependencies into 
``traffic_portal/node_modules``. Only needs to be done the first time unless 
``traffic_portal/package.json`` changes.
 #. Run ``bower install`` to install client-side dependencies into 
``traffic_portal/app/bower_components``. Only needs to be done the first time 
unless ``traffic_portal/bower.json`` changes.
+#. Make sure that compass is installed and functioning correctly by running 
``compass version``. If ``compass`` is not running, you can install it on 
macOSas follows:
+    #. macOS comes with its own version of ruby built into it. In order to 
install compass, if you run a command like ``sudo gem install compass``, it 
will take the default ruby available in mac. In order to properly install 
compass, here is what you should be doing:
+    #. ``brew install ruby``
+    #. ``gem update --system``
+    #. ``gem install compass``
+       Note: You might need to install sass before you install compass. You 
can do that by running:

Review comment:
       This is not an optional step. I changed the text to reflect that.




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