With the various cautionary notes . . .
Lightroom 6.14 itself is 64-bit, but the installer and licensing code are 32-bit. If it’s already installed, Lightroom 6.14 may continue to work, but you won’t be able to install, uninstall or reactivate it. For these reasons, Adobe does not recommend using it on Catalina and it is not supported on Catalina.
. . . and the warning from my System Report (System Preferences > System Report >Software > Legacy Software) (see below), I'm reticent to upgrade to Catalina until I hear from others of their success. I don't
need to upgrade right away, but at some point I will. I expect, rather sadly, I will need to cave in to Adobe's subscription service.
You might be tempted to wax on about what
might happen and about delaying upgrade or even about the wondrous beauty of the new Lr Classic, but really, this post is about providing real-time,
user experience with Lightroom 6.14 and macOS Catalina, so let's try to stick to the topic.