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What version of OS X are on the other Macs?
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What version of OS X are on the other Macs?

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Safari or other browser? I'd try Safari first. Does the test meeting work for you? I tried <a href="https://www.webex.com/test-meeting.html" rel="ugc">https://www.webex.com/test-meeting.html</a>&nbsp;from Safari, it worked. What version of the add-on do you have?<br />
<a href="https://filedb.experts-exchange.com/incoming/2016/02_w09/1083639/Screen-Shot-2016-02-26-at-22.28.42.png" target="_blank" title="Screen-Shot-2016-02-26-at-22.28.42.png (100 KB)"><img alt="Screen-Shot-2016-02-26-at-22.28.42.png" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2016/02_w09/800_1083639/Screen-Shot-2016-02-26-at-22.28.42.png" /></a>
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Safari or other browser? I'd try Safari first. Does the test meeting work for you? I tried https://www.webex.com/test-meeting.html [https://www.webex.com/test-meeting.html] from Safari, it worked. What version of the add-on do you have?
Screen-Shot-2016-02-26-at-22.28.42.pnghttps://filedb.experts-exchange.com/incoming/2016/02_w09/1083639/Screen-Shot-2016-02-26-at-22.28.42.png

Screen-Shot-2016-02-26-at-22.28.42.png

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Hello, <br />
Version 10.11.2<br />
Firefox is the browser I use. I've tried Safari and Chrome also, but it<br />
doesn't work in either of those. &nbsp;I will try the test site.<br />
29.13.71.10003 E
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Hello,
Version 10.11.2
Firefox is the browser I use. I've tried Safari and Chrome also, but it
doesn't work in either of those.  I will try the test site.
29.13.71.10003 E

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What error messages do you get when it fails to start?
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What error messages do you get when it fails to start?

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it just goes to 98% and hangs
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The plugin from the test site is newer, Firefox I'm using is the latest: 44.0.2
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The plugin from the test site is newer, Firefox I'm using is the latest: 44.0.2

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@Gerwin can you point me to the newer plugin please. &nbsp;I'd like to try that. &nbsp;Are you on a Mac per chance same OS version and with Firefox and this plugin it works?
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@Gerwin can you point me to the newer plugin please.  I'd like to try that.  Are you on a Mac per chance same OS version and with Firefox and this plugin it works?

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I can check later for you, I'm on the latest Mac OS X beta. &nbsp;The plugin you get by going to the test Webex meeting.
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I can check later for you, I'm on the latest Mac OS X beta.  The plugin you get by going to the test Webex meeting.

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Interesting....I will call into WebEx support
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Interesting....I will call into WebEx support

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<div class="content wysiwyg-content">
I have a MAC Book Pro running OS X El Capitan version 10.11.2 It has 16GB Ram and we've tried reinstalling WebEx and downloaded the latest. We tried this plugin This is the plug in I'm downloading. It's directly from sick.webex.com <a href="https://sick.webex.com/mc0901lsp13/webcomponents/docshow/docshow.do?isPluginInstalled=no&siteurl=sick&pluginDir=Flash%20Player.plugin&rnd=0.3429503919709953" rel="ugc">https://sick.webex.com/mc0901lsp13/webcomponents/docshow/docshow.do?isPluginInstalled=no&siteurl=sick&pluginDir=Flash%20Player.plugin&rnd=0.3429503919709953</a>&nbsp;and can't get it to launch. It works on other MACs
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I have a MAC Book Pro running OS X El Capitan version 10.11.2 It has 16GB Ram and we've tried reinstalling WebEx and downloaded the latest. We tried this plugin This is the plug in I'm downloading. It's directly from sick.webex.com https://sick.webex.com/mc0901lsp13/webcomponents/docshow/docshow.do?isPluginInstalled=no&siteurl=sick&pluginDir=Flash%20Player.plugin&rnd=0.3429503919709953 and can't get it to launch. It works on other MACs

MAC only loads WebEX to 98% and hangs

Web conferencing describes various types of online collaborative services including web seminars ("webinars"), webcasts, and peer-level web meetings. In general, web conferencing is made possible by Internet technologies, particularly on TCP/IP connections. Services may allow real-time point-to-point communications as well as multicast communications from one sender to many receivers. It offers data streams of text-based messages, voice and video chat to be shared simultaneously, across geographically dispersed locations. Applications for web conferencing include meetings, training events, lectures, or presentations from a web-connected computer to other web-connected computers. Popular titles include GoToMeeting, Cisco WebEx, Microsoft Lync, TeamViewer and Skype.

Conferencing Software

Mac OS X is the desktop operating system from Apple Inc., found on Macintosh computers. OS X consists of a Mach/BSD-based kernel, operating system interfaces primarily based on FreeBSD and additional frameworks (written in C, C++ and Objective-C providing user interface and application-level services.

Mac OS X

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.