Index: trunk/native/macosx/macos-jpackage.sh
===================================================================
--- trunk/native/macosx/macos-jpackage.sh	(revision 19030)
+++ trunk/native/macosx/macos-jpackage.sh	(revision 19031)
@@ -106,4 +106,15 @@
     llvm-lipo-15 -create -output "${1}" "${2}" "${3}"
   fi
+  if [ -n "${KEYCHAINPATH}" ]; then
+    codesign --remove-signature "${1}"
+    codesign --sign "FOSSGIS e.V." \
+      --force \
+      --keychain "${KEYCHAINPATH}" \
+      --timestamp \
+      --prefix "de.openstreetmap.josm" \
+      --identifier "de.openstreetmap.josm" \
+      --options runtime \
+      --verbose=4 "${1}"
+  fi
 }