diff a/cmake/modules/SetUpMacOS.cmake b/cmake/modules/SetUpMacOS.cmake
--- a/cmake/modules/SetUpMacOS.cmake
+++ b/cmake/modules/SetUpMacOS.cmake
@@ -8,17 +8,10 @@ set(ROOT_ARCHITECTURE macosx)
 set(ROOT_PLATFORM macosx)
 
 if (CMAKE_SYSTEM_NAME MATCHES Darwin)
-  EXECUTE_PROCESS(COMMAND sw_vers "-productVersion"
-                  COMMAND cut -d . -f 1-2
-                  OUTPUT_VARIABLE MACOSX_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE)
-
   MESSAGE(STATUS "Found a macOS system ${MACOSX_VERSION}")
 
-  if(MACOSX_VERSION VERSION_GREATER 10.7 AND ${CMAKE_CXX_COMPILER_ID} MATCHES Clang)
     set(libcxx ON CACHE BOOL "Build using libc++" FORCE)
-  endif()
 
-  if(MACOSX_VERSION VERSION_GREATER 10.4)
     #TODO: check haveconfig and rpath -> set rpath true
     #TODO: check Thread, define link command
     #TODO: more stuff check configure script
@@ -37,23 +30,7 @@ if (CMAKE_SYSTEM_NAME MATCHES Darwin)
        SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m64")
        SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m64")
        SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -m64")
-    else()
-       MESSAGE(STATUS "Found a 32bit system")
-       SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -m32")
-       SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -m32")
-       SET(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -m32")
-    endif()
-  endif()
-
-  if(MACOSX_VERSION VERSION_GREATER 10.6)
-    set(MACOSX_SSL_DEPRECATED ON)
-  endif()
-  if(MACOSX_VERSION VERSION_GREATER 10.7)
-    set(MACOSX_ODBC_DEPRECATED ON)
-  endif()
-  if(MACOSX_VERSION VERSION_GREATER 10.8)
-    set(MACOSX_GLU_DEPRECATED ON)
-  endif()
+     endif()
 
   if (CMAKE_COMPILER_IS_GNUCXX)
      message(STATUS "Found GNU compiler collection")
@@ -115,7 +92,6 @@ if (CMAKE_SYSTEM_NAME MATCHES Darwin)
   endif()
 
   #---Set Linker flags----------------------------------------------------------------------
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -mmacosx-version-min=${MACOSX_VERSION}")
 else (CMAKE_SYSTEM_NAME MATCHES Darwin)
   MESSAGE(FATAL_ERROR "There is no setup for this this Apple system up to now. Don't know waht to do. Stop cmake at this point.")
 endif (CMAKE_SYSTEM_NAME MATCHES Darwin)
diff a/config/root-config.in b/config/root-config.in
--- a/config/root-config.in
+++ b/config/root-config.in
@@ -312,12 +312,6 @@ macosxicc)
    ;;
 macosx64|macosxarm64)
    # MacOS X with gcc (GNU cc v4.x) in 64 bit mode
-   macosx_major=`sw_vers | sed -n 's/ProductVersion://p' | cut -d . -f 1 | sed -e 's/^[[:space:]]*//'`
-   macosx_minor=`sw_vers | sed -n 's/ProductVersion://p' | cut -d . -f 2`
-   # cannot find the one linked to libGraf if relocated after built
-   if [ $macosx_major -eq 10 -a $macosx_minor -le 4 ]; then
-      rootlibs="$rootlibs -lfreetype"
-   fi
    auxcflags="${cxxversionflag} -m64"
    auxldflags="-m64"
    auxlibs="-lm -ldl"
@@ -378,18 +372,11 @@ freebsd* | openbsd* | linux*)
    done
    ;;
 macosx*)
-   if [ \( $macosx_major -eq 10 -a $macosx_minor -ge 5 \) -o $macosx_major -gt 10  ]; then
       auxcflags="-pthread $auxcflags"
       auxlibs="-lpthread $auxlibs"
-   else
-      auxcflags="-D_REENTRANT $auxcflags"
-      auxlibs="-lpthread $auxlibs"
-   fi
    for f in $features ; do
       if test "x$f" = "xrpath" ; then
-         if [ \( $macosx_major -eq 10 -a $macosx_minor -ge 5 \) -o $macosx_major -gt 10  ]; then
             auxlibs="-Wl,-rpath,$libdir $auxlibs"
-         fi
       fi
       if test "x$f" = "xlibcxx" ; then
          auxcflags="-stdlib=libc++ $auxcflags"