I've installed a couple of the samples in a Unity 6 (6000.0.25f) project and when I go into play mode, they just show a black screen. No UI, and no scene behind it. Do I need to do something to update the scenes? Or will it only work period if I have a license (which I've not yet purchased. I thought it was supposed to be able to run for up to 10 minutes without one?)

Is this using the URP pipeline? Please make sure you are using Noesis 3.2.6, we are still working on compatibility with Unity 6.

Yes am using the URP pipeline and I am using 3.2.6

yes, that should work, what example are you playing, could you please paste an image here?

I've tried Hello World and Buttons. They both show the same thing in play mode. When I move the cursor around the screen, it plays the sounds that play when you move over the buttons, just can't see them

This seems to be a specific problem with Unity 6 and macOS, could you please file a ticket? Thank you!

Can't figure out how to file a ticket. Could you point me in the right direction?

Did you try adding the Custom Pass Volume? I also had a black screen before with all the samples shipped with the package. After adding that volume and setting it up correctly the GUI worked perfectly.

Did you try adding the Custom Pass Volume? I also had a black screen before with all the samples shipped with the package. After adding that volume and setting it up correctly the GUI worked perfectly.

I assume you mean adding of a Global Volume and following the URP instructions in the documentation for Camera Stacking? I did give that a try and I do get different results, but not quite right. The game window is no longer black, but does not show the UI:


But in play mode when I switch to the Scene view, I do see the UI, just from behind it looks like?

Since there's camera stacking for URP more things could probably end up wrong, hard to say from your screenshot.
Would you mind sharing your camera and volume settings?