Quote -  OK, I installed everything. Adobe AIR was, as I suspected, already installed with Photoshop CS5 Extended. (Remember, this is on a Macintosh.) 

When I tried to start the export, I got what's shown in the Screen Shot:

Nothing happened, though. I tried selecting first one than the other, of "data" and of "ui." Next, I went to the File Menu, and selected "Run Python Script."  I navigated to the "PoserLuxExporter.py" script and chose it. A blank box opened and the spinning beachball commenced. Nothing. Checking the App, I got the message that Poser (2010) was not responding. I had to quit the app in order to get out of it.

I'm not giving up, though. Can anyone please help? The PoserLuxExporter is "alpha_1-12," just downloaded yesterday. The LuxRender is "_v07-Install_OSX_universal_intel," just downloaded yesterday. AdobeAIR is version 2.0.3, the current version. (The Photoshop v and the v downloaded yesterday are the same.) My Intel iMac Computer is running OS 10.6.4. It's a Core Duo Extreme, with 4 GBs Ram, and an ATI Radeon 2600 Pro graphics card with 256 MBs of Ram.

Anyway, what should I try next?

adp - This is something else I did not have time to talk about but here it is. Because you tell people to put the whole Python tree inside the Poser Scripts menu, they think they can and should navigate down into the parts.

This is not a good structure and I'm changing it.

I'm referring to the screen shot above where we see the user navigating through the internal folders of LuxPose.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)