Menubar

<tc:menubar>, <tc:menu>, <tc:menuCommand> and <tc:menuSeparator> are deprecated.

Use the bar facet in a content box with a <tc:buttons> tag instead.
For a dropdownmenus have a look at the 'Dropdown' section on the Link & Button page.
To add a separator just use <tc:separator/>.

Replacement 

<tc:box label="Content Box">
  <f:facet name="bar">
    <tc:buttons>
      <tc:button label="One" omit="true"/>
      <tc:button label="Two" omit="true"/>
      <tc:button label="Three" omit="true">
        <tc:command label="Four"/>
        <tc:command label="Five"/>
        <tc:separator/>
        <tc:command label="Six"/>
      ...

Content Box

Content 

<?xml version="1.0" encoding="UTF-8"?>

<!--
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
-->

<ui:composition template="/main.xhtml"
                xmlns="http://www.w3.org/1999/xhtml"
                xmlns:tc="http://myfaces.apache.org/tobago/component"
                xmlns:ui="http://java.sun.com/jsf/facelets"
                xmlns:f="http://java.sun.com/jsf/core">
  <ui:param name="title" value="#{demoBundle.menubar}"/>

  <p><code class="language-markup">&lt;tc:menubar></code>,
    <code class="language-markup">&lt;tc:menu></code>,
    <code class="language-markup">&lt;tc:menuCommand></code> and
    <code class="language-markup">&lt;tc:menuSeparator></code> are deprecated.</p>
  <p>Use the <code>bar</code> facet in a content box with a
    <code class="language-markup">&lt;tc:buttons></code> tag instead.
<br/>
    For a dropdownmenus have a look at the 'Dropdown' section on the
    <tc:link label="#{demoBundle.button_link}"
             outcome="/content/20-component/040-command/00-button+link/button+link.xhtml"/> page.
    <br/>
    To add a separator just use <code class="language-markup">&lt;tc:separator/></code>.</p>

  <tc:section label="Replacement">
    <pre><code class="language-markup">&lt;tc:box label="Content Box">
  &lt;f:facet name="bar">
    &lt;tc:buttons>
      &lt;tc:button label="One" omit="true"/>
      &lt;tc:button label="Two" omit="true"/>
      &lt;tc:button label="Three" omit="true">
        &lt;tc:command label="Four"/>
        &lt;tc:command label="Five"/>
        &lt;tc:separator/>
        &lt;tc:command label="Six"/>
      ...</code></pre>
    <tc:box label="Content Box">
      <f:facet name="bar">
        <tc:buttons>
          <tc:button label="One" omit="true"/>
          <tc:button label="Two" omit="true"/>
          <tc:button label="Three" omit="true">
            <tc:link label="Four"/>
            <tc:link label="Five"/>
            <tc:separator/>
            <tc:link label="Six"/>
          </tc:button>
        </tc:buttons>
      </f:facet>
      <p>Content</p>
    </tc:box>
  </tc:section>
</ui:composition>