I've tried to find a solution for my problem online but haven't come across anyone with the same issue. I often work with powerpoint presentations with many videos in it.

The videos play just fine on my laptop and also when hooked up to an external monitor, which I use when at work, both in slideshow mode and when previewing my animations. However, when I hook up my mac onto a projector the videos won't play - not on my laptop screen nor on the projected screen.

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I've tried rearranging the displays by draggin the menu bar to either display and also switched from mirror screens to presenter's view within powerpoint but nothing helped solve the issue. The only solution I found is to play the presentation on my windows partition - which is not really what I'm planning to do for long term. I'm using Powerpoint 2011 for mac and this problem has occurred using multiple projectors. Any help on how to solve this issue is highly appreciated! I had the same problem today in front of an audience with 300 people (MacbookPro OSX 10.10, Thunderbolt-VGA adapter, PPT 14.4.6).

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Here what I figured out so far: 1. It happens when you have PPT open and connect to beamer afterwards 2. You can resolve it (in my case) by quitting PPT and launching it WHEN connected to beamer 3. Yet, make sure Mac does not go into sleep mode or you get a lock-screen in the waiting time. If you do so, you get back to square 1. Quit PPT again 2.

In one case I had to hit the volume control once to get the sound back even though movie was playing So in short: Connect to beamer first, then launch PPT I know it is only a symptom fix but it worked for me. Apple Footer • This site contains user submitted content, comments and opinions and is for informational purposes only. Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors not detailed in the conversations captured in an electronic forum and Apple can therefore provide no guarantee as to the efficacy of any proposed solutions on the community forums. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the.