Issue #21383: OS X installer builds now use "make touch".
diff --git a/Mac/BuildScript/build-installer.py b/Mac/BuildScript/build-installer.py
index a67a606..74c2746 100755
--- a/Mac/BuildScript/build-installer.py
+++ b/Mac/BuildScript/build-installer.py
@@ -985,6 +985,9 @@
         shellQuote(WORKDIR)[1:-1],
         shellQuote(WORKDIR)[1:-1]))
 
+    print("Running make touch")
+    runCommand("make touch")
+
     print("Running make")
     runCommand("make")