diff --git a/zenmap/install_scripts/macosx/README b/zenmap/install_scripts/macosx/README
index 1833eb081..7dfb9330e 100644
--- a/zenmap/install_scripts/macosx/README
+++ b/zenmap/install_scripts/macosx/README
@@ -81,7 +81,12 @@ changes. First, sync the original ports tree.
 	$PREFIX/bin/port selfupdate -v
 Restore a pristine partial ports tree:
 	cd $PREFIX
+	# rsync handles deleting deleted files, but can't pick up new ones like this...
 	rsync -rv --existing --delete --exclude=PortIndex ports.orig/ ports/
+	# ...so we copy everything over again.
+	for x in archivers/xz editors/vim devel/apr-util devel/atk devel/gettext devel/glib2 gnome/gtk2 graphics/fontconfig graphics/gdk-pixbuf2 mail/libidn perl/p5-locale-gettext python/py-gobject python/py-libxml2 textproc/help2man textproc/libxml2 textproc/libxslt x11/pango; do
+		cp -R ports.orig/$x ports/$(dirname $x);
+	done
 Reapply the patch. Resolve any conflicts.
 	patch -p0 --no-backup-if-mismatch < MacPorts-ports.diff
 Make a new patch.