Our product uses an installer/.pkg file for distribution. The pkg has a branded background image.
In Mojave Dark Mode, that background goes away and is replaced by the system default dark gray. I see this behavior in both our product and in the Python 3.7 installer (https://www.python.org/ftp/python/3.7.0/python-3.7.0-macosx10.9.pkg).
Anybody know of a workaround to restore the background image in Dark Mode? Is there a new/undocumented key for the XML file?