All mac hardware that supports 10.9 also supports 10.11

No real purpose to keeping the default min version at 10.9.

3rdp/build/GNUmakefile

@@ -35,6 +35,9 @@ ifneq ($(os),darwin)
   endif
  endif
 endif
+ifeq ($(os),darwin)
+ JS_CONFIGURE_ARGS += '--enable-macos-target=10.11'
+endif
 # Blacklist some machines...
 
 JS_CONFIGURE_ENV += 'CXXFLAGS=$(CXXFLAGS)'

src/build/Common.gmake

@@ -371,7 +371,7 @@ ifeq ($(os),haiku)
  CFLAGS	+=	-D__unix__ -DNEEDS_FORKPTY
 endif
 ifeq ($(os),darwin)
- MIN_MAC_OSX_VERSION ?= 10.9
+ MIN_MAC_OSX_VERSION ?= 10.11
  CFLAGS +=  -D__unix__ -fno-common -D__DARWIN__
  CFLAGS +=  -mmacosx-version-min=$(MIN_MAC_OSX_VERSION)
  LDFLAGS += -mmacosx-version-min=$(MIN_MAC_OSX_VERSION)