I had it working, I tried first:
xattr -r -d com.apple.quarantine app.app
Then:
sudo xattr -r -d com.apple.quarantine app.app
And then:
sudo chmod -R 755 app.app
jeromebaron
Users receive reputation points by contributing quality content to the forums.
Posts include post and replies published on the forums.
Post authors can mark replies as Accepted to indicate successful solutions.
Apple Developer Forums admins can mark replies as Apple Recommended to indicate an approved solution