If at least one field should be hidden by condition in group field whole metabox not displayed in Setting page, for Page its work well:

piklist/parts/settings/hf-settings.php:

<?php
/*
Title: Header and Footer settings
Setting: hf_settings
*/
piklist('field', array(
    'type' => 'group'
    ,'field' => 'fruit_settings'
    ,'label' => __('Settings')
    ,'add_more' => true
    ,'fields' => array(
      array(
        'type' => 'select'
        ,'field' => 'country'
        ,'label' => 'Country'
        ,'columns' => 12
        ,'choices' => array(
            'US' => 'United States'
            ,'EU' => 'European Union'
          )
        )
        ,array(
          'type' => 'select'
          ,'field' => 'fruits'
          ,'label' => 'Fruits'
          ,'columns' => 12
          ,'choices' => array(
            'apples' => 'Apples'
            ,'oranges' => 'Oranges'
          )
        )
        ,array(
          'type' => 'select'
          ,'field' => 'apples'
          ,'label' => 'Apples'
          ,'columns' => 12
          ,'choices' => array(
            'aceymac' => 'Aceymac Apple'
            ,'akero' => 'Akero Apple'
          )
          ,'conditions' => array(
            array(
              'field' => 'fruit_settings:fruits'
              ,'value' => 'apples'
            )
          )
        )
        ,array(
          'type' => 'select'
          ,'field' => 'oranges'
          ,'label' => 'Oranges'
          ,'columns' => 12
          ,'choices' => array(
            'blood' => 'Blood Orange'
            ,'navel' => 'Navel Orange'
          )
          ,'conditions' => array(
            array(
              'field' => 'fruit_settings:fruits'
              ,'value' => 'oranges'
            )
          )
        )
    )
  ));

Code in function.php

add_filter('piklist_admin_pages', 'piklist_theme_setting_pages');
  function piklist_theme_setting_pages($pages)
  {
     $pages[] = array(
      'page_title' => __('Header Footer settings')
      ,'menu_title' => __('Header and Footer', 'piklist')
      ,'sub_menu' => 'themes.php' //Under Appearance menu
      ,'capability' => 'manage_options'
      ,'menu_slug' => 'custom_settings'
      ,'setting' => 'hf_settings'
      ,'menu_icon' => plugins_url('piklist/parts/img/piklist-icon.png')
      ,'page_icon' => plugins_url('piklist/parts/img/piklist-page-icon-32.png')
      ,'single_line' => true
      ,'default_tab' => 'Basic'
      ,'save_text' => 'Save'
    );

    return $pages;
  }