P: Saving copy not saving over jpg file

Downloaded a PSD mock-up from envato.
Changed stuff, place my desing. Save...no problem. 
Multi layerd psd. 
Why?

Wow, this thread is TIRED.

At this point it's pretty clear that Adobe's rental scam isn't resulting in more and more-timely bug fixes, so either dump them and reward a company that respects its users... or don't, and continue to limp along with defective software.

Adobe's obviously not paying any attention to this forum.  As a Creative Cloud subscriber, I get a survey on every Adobe app every few weeks.  Every time, in the "what would make you recommend (Photoshop, InDesign, Illustrator, whatever) to others?" field I put "Fix the Photoshop Save As bug!"  Then I check the "OK to contact me" box.

Fix it, Adobe!  It might be caused by a change in Catalina, but it's still your bug!

@wayne_heywood I tested PS 21.4.2 on the Big Sur beta a few weeks ago and the problem still existed. I haven't had a chance to try 22.0.0 yet.

*wayne_heywood I don't have Big Sur Beta so I wouldn't know.

Thanks @ravnorodom, that's very interesting. Do you know if it still an issue on Big Sur Beta? 

This is very interesting to me... because Adobe has claimed that it is an issue with Apple/Catalina... yet other apps (including Adobe apps) work as expected... and even Photoshop works as expected when files don't need to be flattened (or " copy" is added to the name.)

I just updated Photoshop 2021 (v. 22.0.0) on both my Mac at home (Catalina) and my Mac at work (Mojave). On Catalina, problem saving over jpeg still exists. On Mojave, the problem does not exist. I even tested Photoshop 2019 (v. 20.0.10) on both Catalina and Mojave and the results are the same. My conclusion tells me it has a lot to do with Mac OS Catalina.

I'm happy to @#$% on Adobe for failing to fix this in PS 22. This is beyond the pale. I've moved to opening all existing jpgs and dragging history over, flattening, and saving to avoid dynamic linking problems and file management issues.

Come ON Adobe. Start earning your exorbitant subscription fees. Give some love to the small but dedicated group of professionals for whom this BUG is a daily headache.

Let me also add that I am saddened that, since PS 21, you can no longer rename a file in the finder for a file that is open in PS, continue to work on, then save that file and have the name automatically update in the open file.

Major bug from 21.x.x still exists in 22.0.0

Steps to reproduce:

1. Create a document with layers. Use the Save As... command to save as a JPG.
2. Make changes to document. Click "Save As..." save as JPG using the same name.
3. OS will ask if overwriting the file. Click "Overwrite." 
4. PS will ask about jpg settings.
5. File is saved with " copy" appended to name, it does not overwrite file as indicated.
6. This bug appears anytime a file with layers is being saved without layers. This includes PNG, TIFF, and even PSD files. 

This bug breaks dynamic linking. And causes a lot of stress and anxiety.

This bug also has its own bug. If you name your file "Untitled-1 copy.jpg" and attempt to save over it, the file will be overwritten as the program warns. Basically adding " copy" to your filename causes Photoshop to work the way it has worked up until version 21.x.x. This causes a problem for anyone who expect the app to not overwrite files, even when it tells you it will. (Which should be no one, but this is the internet.)