I am on Windows10. I use xnviewMP
- it is free but not FOSS
- there is a version for MAC (don’t know if working on Catalina)
- rather light
- can display a lot of different formats
- color managed
- powerful batch rename and batch processing
- can copy/delete/move images but to one folder at the same time. You will have to ask the dev for multiple targets.
- I use it to cull photos