Did a search and this is what I found: https://helpx.adobe.com/photoshop/kb/photoshop-and-macos-catalina.htmlMany thanks. That's helpful to know.
Thanks TonyK.Did a search and this is what I found: https://helpx.adobe.com/photoshop/kb/photoshop-and-macos-catalina.html
"Photoshop 20.0.6 and later versions work with macOS 10.15 (Catalina) but have these known compatibility issues. You may want to remain on your current version of macOS until these issues have been resolved."
Also found this @ https://blog.conradchavez.com/2019/08/28/macos-10-15-catalina-will-adobe-software-work/. If you go a little further down the page he shows other items from the CS3 suite.
Older versions of Adobe software (CS3–CS6)
Already officially unsupported, many Adobe Creative Suite 3 through 6 applications do not make the cut for macOS 10.15 Catalina because they are not 64-bit code (see below). Many of them already have significant issues running in macOS 10.14 Mojave. CS3–CS5 applications are now 10–13 years old. It is time to upgrade…or you can keep using them under older versions of macOS/Mac OS X.
Affinity Photo. $50USD. People I know who switched, a few who are professional photographers, say it has about 99% of the functionality. The URL is https://affinity.serif.com/en-us/photo/.... but I do wonder whether there is a cheap alternative to Photoshop which obviously will not be rich with its features but will have some useful functionality..