Sorry for the delay everyone, we had to perform a lot of trial-and-error debugging on our MacOS build process; see https://github.com/keepassxreboot/keepassxc/pull/2165
However, we now have fully functional Drag-N-Drop snapshots of 2.4.0 available for MacOS in our snapshot repository: https://snapshot.keepassxc.org/latest
This is all possible because of your generous donations which enabled the purchase of a dedicated Mac Mini for continuous integration builds. Every time the develop branch is updated, a new snapshot will be posted.