The project builds successfully when I try to run the .app it throws the error “failed to find descriptor file”. I found a solution in merging the packaged project files with those found in the project source folder (the UE4 editor files) but this is undesirable. C++ projects built out, run and packaged as expected.
We have seen this > https://answers.unrealengine.com/questions/12873/error-after-packaging-on-mac-os-x.html < And have tried to run it via the terminal but were unsuccessful.