Issue #15663: Force IDLE.app to run the GUI process in 32-bit mode.
This mitigates the current Aqua Tk refresh problem on OS X 10.9
by backporting 2.7.x behavior and is transparent to the user.
diff --git a/Mac/Makefile.in b/Mac/Makefile.in
index 354c1fd..5cb664d 100644
--- a/Mac/Makefile.in
+++ b/Mac/Makefile.in
@@ -166,6 +166,10 @@
 	-test -d "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app" && rm -rf "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app"
 	/bin/cp -PR "$(srcdir)/IDLE/IDLE.app" "$(DESTDIR)$(PYTHONAPPSDIR)"
 	ln -sf "$(INSTALLED_PYTHONAPP)" "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/Python"
+ifneq ($(LIPO_32BIT_FLAGS),)
+	rm "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/Python"
+	lipo $(LIPO_32BIT_FLAGS) -output "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/Python" "$(BUILDPYTHON)"
+endif
 	sed -e "s!%prefix%!$(prefix)!g" -e 's!%exe%!$(PYTHONFRAMEWORK)!g' < "$(srcdir)/IDLE/IDLE.app/Contents/MacOS/IDLE" > "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/MacOS/IDLE"
 	sed "s!%version%!`$(RUNSHARED) $(BUILDPYTHON) -c 'import platform; print(platform.python_version())'`!g" < "$(srcdir)/IDLE/IDLE.app/Contents/Info.plist" > "$(DESTDIR)$(PYTHONAPPSDIR)/IDLE.app/Contents/Info.plist"
 	if [ -f "$(DESTDIR)$(LIBDEST)/idlelib/config-main.def" ]; then \