I found the cause of the problem and it didn’t relate to the WordPress 3.6 or Enfold Theme 1.9.1. The problem was created because there was a mismatch in the Settings

WordPress Address was set to: http://mydomain.com/wordpress

Site Address was set to: http://www.mydomain.com

I corrected the WordPress to http://www.mydomain.com/wordpress and the toolbar is now showing.