Okay, you are right.
Guess I missed the top left one, because all in all there are five orange exclamation marks and a few more orange graphic elements, so I just saw the Mac OS X one and the bottom one and missed the top one.

But thank you, everything works fine now.

MD

Thanks Radiance.
It works now.
However, the instructions on this page are not quite clear, I think (at least not for people who are not familiar with the subject, like me). It says "The software requires the installation of the drivers below."
But on the page it links to both downloads for drivers ...

Hi,

I had the exact same problem as the thread opener.
I installed X11, and now it still doesn't start up, but it comes up with a different error message:

Process: octane [251]
Path: /Applications/OctaneRender 1.022 beta2.2 Demo.app/Contents/MacOS/octane
Identifier: org.refractivesoftware ...