I was contemplating getting a newer operating system as well as a newer Mac in the near future and ran Go64 which reports what programs are 64-bit and what is 32-bit which would no longer run. It reports, in part, that while Adobe Bridge 2021 version 220.127.116.11 is a 64-bit application, one part of the program, Photo Downloader is still 32-bit and would not work. This sub-application is version 8.0 and dates from 2006. First off, what does it do and secondly will it get an update to something newer so it will continue to work in Big Sur and beyond?
Photo Downloader opens when you’re in Bridge and choose File > Get Photos from Camera. In other words, it’s a direct camera import module that allows pre-processing of files as you import them (by applying presets like file naming and metadata, and auto-organizing into subfolders), kind of like the Import module in Lightroom.
It’s useful, but I don’t use it because I import through Lightroom Classic.
64-bit compatibility might not be a real issue…it’s a little weird. I also ran Go64 and it said Photo Downloader was not 64-bit, but here is the weird thing: I am running macOS 10.15 (Catalina) which is not supposed to allow running 32-bit applications, but Photo Downloader certainly runs on my Catalina Mac, or at least it starts up. So it is possible that Photo Downloader is somehow mislabeled and works anyway.
For reference, here is the official Adobe tech note talking about Bridge compatibility with Big Sur. Photo Downloader is not listed, so maybe it’s OK for Big Sur and Apple Silicon.