Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
What exact Mac OS X version and Elgato product do you use with what exact Mac?

To find out what Mac OS X version you run, click :apple: > About This Mac:
IDyourMacOS.png
To find out, what exact Mac model you use, click :apple: > About This Mac > More Info > Hardware Overview:
IDyourMacModel.png
To see a more elaborate image explaining the above steps, click here.
To see a more detailed video tutorial showing the above steps, click here (2 MB, 23s, .mp4).​

And did it work before or did you just purchase the Elgato device?

Does it also happen in another, even temporarily created, user account?

To edit your thread title to a descriptive one, to get a knowledgable audience and help making the thread easier to find for people looking for the same information, just click on the
edit.gif
button on the bottom right of your original post and then click the
MR_Edit_GoAdvanced_button.png
button below your message.
Example: Elgato ... (exact product name) does not open on Mac OS X ... (version)
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.