P: Saving copy not saving over jpg file

Unfortunately, this does not fix the issue for me either. (I've also deleted Photoshop and re-added as per Kaleb's suggesstion with no luck).

Good fix, Chris. Still exceedingly shameful Adobe didn't lift a finger to help MacOS users.

It worked for me, I had to delete photoshop from full disk access and re-add it. THANK YOU!

Same stupid issue. Change it back Adobe.

I'm happy this seems to work for you, but this doesn't fix the issue for me. When saving a multi-layered PSD as a flat jpg, the "save a copy" is required to be checked, that's photoshops way of reminding you that the jpg won't have layers. And anytime the "save a copy" checkbox is checked, photoshop now appends "copy" to the filename. (Unless the filename already has a "copy" at the end, in which case ==>This is new ==> photoshop now has a secondary dialog box asking if you are sure you want to overwrite your file. But again, only if you have appended the word "copy" to your filename.

At this point I'm convinced they will never fix this behavior because they have gone out of their way to make it work differently than it used to. 

You can still overwrite flat files, but anything with layers requires copies. Our only hope now is for one of us to become a CEO at Adobe and fire the person(s) responsible for this decision. 

Ok I think I figure out a fix for this, if someone could please try it on their end and confirm. The issue that I can see is that on the Save As screen, the "Save as Copy" is checked, and there is no way to uncheck. 

1. Quit Photoshop
2. Go to System Preferences
3. Click on "Security & Privacy"
4. Click the "Privacy" tab
5. If the little padlock in the bottom left corner is checked, click it to unlock it and enter your user password.
6. On the left side, click "Full Disk Access"
7. Click the + button
8. Add Adobe Photoshop
9. Click the lock again to make changes
10. Start up Photoshop, open a file, and click "Save As"
11. The "Save As Copy" should now be able to be unchecked.
12. Uncheck, and save. 

Even if I remove photoshop from the Full Disk Access list, the problem remains to be fixed for me, so I can't re-duplicate the issue to verify. Let me know if it works for you!

Forgot to add that this will successfully overwrite a previous TIFF file of the same name.

I found a solution for saving Tiff files from layered PSD files: In the Save As dialog, after you choose TIF from the drop down, DON'T uncheck the Layers box. Instead, just click SAVE and when the TIFF OPTIONS box appears, select Discard Layers and Save a Copy from the Layer Compression section. This will give you a flat TIFF file with no "Copy" added. 

If you can just accept that your needs as an established customer don't matter as much as enticing new monthly conscripts, everything will be exactly as they feel it should be.

I am also having a slew of other problems in addition to not the copy-save.

Anyone else experience a blank screen when opening an image that you just closed? I have to constantly quit and relaunch the app in order to be able to view that image again. Only in Catalina.