diff --git a/packaging/build_macos_signed.sh b/packaging/build_macos_signed.sh
index 87173f229..97ef76563 100755
--- a/packaging/build_macos_signed.sh
+++ b/packaging/build_macos_signed.sh
@@ -113,71 +113,21 @@ echo "==> dmg"
 DMG="$DIST/OpenCADStudio-v$VERSION-macos-arm64.dmg"
 rm -f "$DMG"
 
-# Stage the .app next to a symlink to /Applications so the DMG opens onto
-# the familiar "drag the icon onto Applications" installer layout, rather
-# than dropping just the bare .app into the user's Downloads-mounted volume
-# with no indication of where it's supposed to go (#769).
+# Stage the app next to the install-location shortcut (#769).
 STAGING="$DIST/dmg-staging"
 rm -rf "$STAGING"
 mkdir -p "$STAGING"
 cp -R "$APP" "$STAGING/"
 ln -s /Applications "$STAGING/Applications"
 
-# Build read-write first so Finder can save the window's icon layout, then
-# convert to the compressed read-only image the CI job's own DMG step
-# already produces — same two-stage approach that layout customization
-# always needs, since a UDZO image can't be mounted for editing afterward.
-RW_DMG="$DIST/OpenCADStudio-rw.dmg"
-rm -f "$RW_DMG"
 for i in 1 2 3 4 5; do
-    if hdiutil create -volname "Open CAD Studio" -srcfolder "$STAGING" -ov -format UDRW -fs HFS+ "$RW_DMG"; then
+    if hdiutil create -volname "Open CAD Studio" -srcfolder "$STAGING" -ov -format UDZO "$DMG"; then
         break
     fi
-    echo "hdiutil create (rw) failed (attempt $i), retrying..." >&2
+    rm -f "$DMG"
+    echo "hdiutil failed (attempt $i), retrying..." >&2
     sleep 3
 done
-[ -f "$RW_DMG" ] || { echo "hdiutil create (rw) failed permanently" >&2; exit 1; }
-
-MOUNT_DIR="$(mktemp -d /tmp/ocs-dmg-mount.XXXXXX)"
-hdiutil attach "$RW_DMG" -mountpoint "$MOUNT_DIR" -quiet
-# Finder's own volume list can lag a moment behind `hdiutil attach`
-# returning, and "container window of <alias>" isn't a valid reference the
-# way "container window of disk <name>" is — so poll by name (up to 15s)
-# before touching it, rather than a fixed sleep or a path-based reference.
-osascript <<APPLESCRIPT || echo "DMG layout script failed (non-fatal, keeping default Finder view)" >&2
-tell application "Finder"
-    repeat 30 times
-        if (exists disk "Open CAD Studio") then exit repeat
-        delay 0.5
-    end repeat
-    tell disk "Open CAD Studio"
-        open
-        set current view of container window to icon view
-        set toolbar visible of container window to false
-        set statusbar visible of container window to false
-        set the bounds of container window to {200, 120, 760, 480}
-        set viewOptions to the icon view options of container window
-        set arrangement of viewOptions to not arranged
-        set icon size of viewOptions to 96
-        set position of item "OpenCADStudio.app" of container window to {140, 180}
-        set position of item "Applications" of container window to {420, 180}
-        close
-        open
-        update without registering applications
-        delay 1
-    end tell
-end tell
-APPLESCRIPT
-hdiutil detach "$MOUNT_DIR" -quiet
-
-for i in 1 2 3 4 5; do
-    if hdiutil convert "$RW_DMG" -format UDZO -ov -o "$DMG"; then
-        break
-    fi
-    echo "hdiutil convert failed (attempt $i), retrying..." >&2
-    sleep 3
-done
-rm -f "$RW_DMG"
 rm -rf "$STAGING"
 [ -f "$DMG" ] || { echo "hdiutil failed permanently" >&2; exit 1; }