Index: /trunk/src/VBox/Runtime/tools/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Runtime/tools/Makefile.kmk	(revision 75174)
+++ /trunk/src/VBox/Runtime/tools/Makefile.kmk	(revision 75175)
@@ -57,5 +57,5 @@
 
 
- if !defined(VBOX_ONLY_EXTPACKS) || "$(KBUILD_TARGET)" == "win"
+ if !defined(VBOX_ONLY_EXTPACKS) || "$(KBUILD_TARGET)" == "win" || "$(KBUILD_TARGET)" == "darwin"
   # RTSignTool - Signing utility - build version.  Signed on windows so we can get the certificate from it.
   BLDPROGS += bldRTSignTool