Index: build/workspaces/build-osx-bundle.sh
===================================================================
--- build/workspaces/build-osx-bundle.sh
+++ build/workspaces/build-osx-bundle.sh
@@ -181,6 +181,8 @@
   mv config/dev.cfg config/dev.bak
 fi
 cp -R -v config ${BUNDLE_RESOURCES}/data/
+# Workaround for https://trac.wildfiregames.com/ticket/5341
+sed -i s/windowed\ =\ false/windowed\ =\ true/ ${BUNDLE_RESOURCES}/data/config/default.cfg
 cp -R -v l10n ${BUNDLE_RESOURCES}/data/
 cp -R -v tools ${BUNDLE_RESOURCES}/data/
 if [ "$build_release" = "false" ]; then