I decided to download the current official Poser Pro 11.2 install files instead of using the ones I'd already downloaded.

Catalina wants to do a malware check and won't let you run the installers. You can change that behaviour in the Privacy and Security system settings. I didn't do that, instead, I right-clicked on the installer(s) and selected "Open" which will give you a warning about the malware check, but this time with an Open button to run it. Super easy to do.

Both the main installer and the support files installer did their thing. Poser Pro 11.1 was updated to 11.2.296 and I moved my backed up preference/settings files back into the active folder.

No warnings about 32-bit software have shown up at all thus far. Catalina does ask if you want Poser to allow access to the installed folder location when I ran EZSkin3 (which I hadn't configured yet for PP11), and I think during installation it might have asked for access. I've done a quick render of La Femme, but haven't added my external runtime just yet, nor installed any of the additional content. Will do that tomorrow when I have more time.

To recap, Catalina will need you to confirm/override running the installer files if you're doing an update/upgrade. You might have it ask for access to certain folders for scripts, etc. on first launch after updating your MacOS to Catalina.

WIll update again after having more time to test.

Lee