The logic is “ no QuickTime™ in the 10.12 SDK & beyond ”

instead of “ QuickTime only in 10.8 10.9 10.10 & 10.11 ”

related commits are
  a4e81b7c
  bfbbbd87

Change-Id: Ie65abb736aa11ad063edeaed798d2e03db1684fe
Reviewed-on: https://gerrit.libreoffice.org/29268Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: jan iversen <jani@documentfoundation.org>

Repository.mk

@@ -283,7 +283,7 @@ $(eval $(call gb_Helper_register_libraries_for_install,OOOLIBS,ooo, \
 	$(if $(filter MACOSX,$(OS)),\
 		avmediaMacAVF \
 		$(if $(ENABLE_MACOSX_SANDBOX),,\
-			$(if $(filter 1080 1090 101000 101100,$(MACOSX_SDK_VERSION)),avmediaQuickTime) \
+			$(if $(shell test $(MACOSX_SDK_VERSION) -ge 101200 || echo not),avmediaQuickTime) \
 		) \
 	) \
 	$(call gb_Helper_optional,SCRIPTING, \

avmedia/Module_avmedia.mk

@@ -37,7 +37,7 @@ endif
 
 ifeq ($(OS),MACOSX)
 ifneq ($(ENABLE_MACOSX_SANDBOX),TRUE)
-ifneq ($(filter 1080 1090 101000 101100,$(MACOSX_SDK_VERSION)),)
+ifneq ($(shell test $(MACOSX_SDK_VERSION) -ge 101200; echo $$?),0)
 $(eval $(call gb_Module_add_targets,avmedia,\
 	Library_avmediaQuickTime \
 ))

postprocess/Rdb_services.mk

@@ -127,7 +127,7 @@ $(eval $(call gb_Rdb_add_components,services,\
 	$(if $(filter MACOSX,$(OS)), \
 		$(call gb_Helper_optional,AVMEDIA,avmedia/source/macavf/avmediaMacAVF) \
 		$(if $(filter TRUE,$(ENABLE_MACOSX_SANDBOX)),, \
-			$(if $(filter 1080 1090 101000 101100,$(MACOSX_SDK_VERSION)), \
+			$(if $(shell test $(MACOSX_SDK_VERSION) -ge 101200 || echo nope), \
 				$(call gb_Helper_optional,AVMEDIA,avmedia/source/quicktime/avmediaQuickTime) \
 			) \
 		) \