Hmm, can you share some details to figure that out? The build was tested by someone else with MAC too and ran without errors, it's true that you need to take a few steps because running an app from an unknown developer and so on, like here https://support.apple.com/guide/mac-help/open-a-mac-app-from-an-unknown-develope...
Besides that, I'm not really experienced with MAC but share the error through pastebin or something so I can take a look at it.
Viewing post in OA New Dawn PLUS Edition comments
I see, try the new link with the new build and see if it throws that error again, in the meantime I'll do some research about the MAC issues on RenPy and see what I can do about that or if there's something else that I need to do besides checking a box for MAC builds. I'm sorry you have this issues...
Uploading a new build on the same link, please check it out, and let me know, regarding the permission error I couldn't really find anything and not being able to "test it" but the internet is full of issues with MAC builds, so I'll keep trying. On which version of OS you are? Also what I noticed in some cases, that you could use another folder instead of Apps/Downloads, again, I have no experience with MacOS so I'm just saying that I found on the internet.