How to disable Plone 5 Toolbar for authenticated user group?

Scenario below:

• A user logs into my Plone 5 site.
• The toolbar shows up but they have no options to do anything with it because they are in the Authenticated Group.

They only get Authenticated access to view a few areas. How can I suppress the toolbar for certain user groups? or what is the best approach to this?

The simplest approach will be using CSS. You can provide a conditional CSS that hide the toolbar:

#plone-toolbar-container {display: none}

A very simple approach for this is described in this article: http://datakurre.pandala.org/2015/05/plonecustom-for-plone-5.html

Please note: the toolbar contains also a section to personal preference, so removing it will also hide some user's features.