diff --git a/src/corelib/global/qcompilerdetection.h b/src/corelib/global/qcompilerdetection.h
index c699004b5b7..cf4872281ba 100644
--- a/src/corelib/global/qcompilerdetection.h
+++ b/src/corelib/global/qcompilerdetection.h
@@ -893,16 +893,22 @@
 #   endif // !_HAS_CONSTEXPR
 #  endif // !__GLIBCXX__ && !_LIBCPP_VERSION
 # endif // Q_OS_QNX
-# if defined(Q_CC_CLANG) && defined(Q_OS_DARWIN) && defined(__GNUC_LIBSTD__) \
-    && ((__GNUC_LIBSTD__-0) * 100 + __GNUC_LIBSTD_MINOR__-0 <= 402)
+# if defined(Q_CC_CLANG) && defined(Q_OS_DARWIN)
+#  if defined(__GNUC_LIBSTD__) && ((__GNUC_LIBSTD__-0) * 100 + __GNUC_LIBSTD_MINOR__-0 <= 402)
 // Apple has not updated libstdc++ since 2007, which means it does not have
 // <initializer_list> or std::move. Let's disable these features
-#  undef Q_COMPILER_INITIALIZER_LISTS
-#  undef Q_COMPILER_RVALUE_REFS
-#  undef Q_COMPILER_REF_QUALIFIERS
+#   undef Q_COMPILER_INITIALIZER_LISTS
+#   undef Q_COMPILER_RVALUE_REFS
+#   undef Q_COMPILER_REF_QUALIFIERS
 // Also disable <atomic>, since it's clearly not there
-#  undef Q_COMPILER_ATOMICS
-# endif
+#   undef Q_COMPILER_ATOMICS
+#  endif
+#  if defined(__cpp_lib_memory_resource)
+    && (defined(__MAC_OS_X_VERSION_MIN_REQUIRED)  && __MAC_OS_X_VERSION_MIN_REQUIRED  < 140000
+     || defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED < 170000)
+#   undef __cpp_lib_memory_resource // Only supported on macOS 14 and iOS 17
+#  endif
+# endif // defined(Q_CC_CLANG) && defined(Q_OS_DARWIN)
 #endif
 
 // Don't break code that is already using Q_COMPILER_DEFAULT_DELETE_MEMBERS
diff --git a/src/corelib/tools/qduplicatetracker_p.h b/src/corelib/tools/qduplicatetracker_p.h
index 950220184f8..23465ecffed 100644
--- a/src/corelib/tools/qduplicatetracker_p.h
+++ b/src/corelib/tools/qduplicatetracker_p.h
@@ -16,7 +16,7 @@
 
 #include <private/qglobal_p.h>
 
-#if __has_include(<memory_resource>)
+#ifdef __cpp_lib_memory_resource
 #  include <unordered_set>
 #  include <memory_resource>
 #  include <qhash.h> // for the hashing helpers