Use MACOSX_VERSION_MIN=11 on Apple silicon (JuliaLang#39735)

Make.inc

@@ -488,26 +488,15 @@ USEGCC := 0
 USECLANG := 1
 endif
 
+# Note: Supporting only macOS Mavericks and above
 ifeq ($(OS), Darwin)
-DARWINVER := $(shell uname -r | cut -b 1-2)
-DARWINVER_GTE11 := $(shell expr $(DARWINVER) \>= 11)
-DARWINVER_GTE13 := $(shell expr $(DARWINVER) \>= 13)
-ifeq ($(DARWINVER_GTE11),0) # Snow Leopard specific configuration
-USEGCC := 1
-USECLANG := 0
-MACOSX_VERSION_MIN := 10.6
-OPENBLAS_TARGET_ARCH:=NEHALEM
-OPENBLAS_DYNAMIC_ARCH:=0
-USE_SYSTEM_LIBUNWIND:=1
-else
-ifeq ($(DARWINVER_GTE13),0) # Lion / Mountain Lion specific configuration
-USEGCC := 0
-USECLANG := 1
-MACOSX_VERSION_MIN := 10.6
-else # Newer versions
+APPLE_ARCH := $(shell uname -m)
 USEGCC := 0
 USECLANG := 1
-endif
+ifneq ($(APPLE_ARCH),arm64)
+MACOSX_VERSION_MIN := 10.9
+else
+MACOSX_VERSION_MIN := 11.0
 endif
 endif
 
@@ -539,9 +528,6 @@ JCXXFLAGS := -pipe $(fPIC) -fno-rtti -pedantic -std=c++14
 DEBUGFLAGS := -O0 -g -DJL_DEBUG_BUILD -fstack-protector
 SHIPFLAGS := -O3 -g
 ifeq ($(OS), Darwin)
-ifeq ($(MACOSX_VERSION_MIN),)
-MACOSX_VERSION_MIN := 10.9
-endif
 CC += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
 CXX += -mmacosx-version-min=$(MACOSX_VERSION_MIN)
 FC += -mmacosx-version-min=$(MACOSX_VERSION_MIN)