I have run jchatsocial enterprise with Joomla 3.7. The chat runs on all tested systems and browsers. Only with the Mac with Safari you have to update the chat window manually to see incoming messages. To be sure we have tested it with a 2nd Mac. The result was the same. If other browsers are installed on the Mac, it works. Only we can not provide customers with the browser.

Why is JChatSocial running under Joomla 3.7 PHP 7.1 not on the Mac with Safari and how to fix the error.