diff --git a/mdbx.h b/mdbx.h
index 2a6a29d9..e3915991 100644
--- a/mdbx.h
+++ b/mdbx.h
@@ -218,10 +218,14 @@ typedef mode_t mdbx_mode_t;
 
 #ifndef __has_feature
 #define __has_feature(x) (0)
+#define __has_exceptions_disabled (0)
+#else
+#define __has_exceptions_disabled                                              \
+  (__has_feature(cxx_noexcept) && !__has_feature(cxx_exceptions))
 #endif /* __has_feature */
 
 #ifndef __has_extension
-#define __has_extension(x) (0)
+#define __has_extension(x) __has_feature(x)
 #endif /* __has_extension */
 
 #ifndef __has_builtin
@@ -236,11 +240,13 @@ typedef mode_t mdbx_mode_t;
  * These functions should be declared with the attribute pure. */
 #if defined(DOXYGEN)
 #define MDBX_PURE_FUNCTION [[gnu::pure]]
-#elif __has_C23_or_CXX_attribute(gnu::pure)
+#elif __has_C23_or_CXX_attribute(gnu::pure) &&                                 \
+    (!defined(__apple_build_version__) || !defined(__clang_major__) ||         \
+     __clang_major__ > 17)
 #define MDBX_PURE_FUNCTION [[gnu::pure]]
 #elif (defined(__GNUC__) || __has_attribute(__pure__)) &&                      \
     (!defined(__clang__) /* https://bugs.llvm.org/show_bug.cgi?id=43275 */ ||  \
-     !defined(__cplusplus) || !__has_feature(cxx_exceptions))
+     !defined(__cplusplus) || __has_exceptions_disabled)
 #define MDBX_PURE_FUNCTION __attribute__((__pure__))
 #else
 #define MDBX_PURE_FUNCTION
@@ -278,11 +284,13 @@ typedef mode_t mdbx_mode_t;
  * It does not make sense for a const function to return void. */
 #if defined(DOXYGEN)
 #define MDBX_CONST_FUNCTION [[gnu::const]]
-#elif __has_C23_or_CXX_attribute(gnu::const)
+#elif __has_C23_or_CXX_attribute(gnu::const) &&                                \
+    (!defined(__apple_build_version__) || !defined(__clang_major__) ||         \
+     __clang_major__ > 17)
 #define MDBX_CONST_FUNCTION [[gnu::const]]
 #elif (defined(__GNUC__) || __has_attribute(__const__)) &&                     \
     (!defined(__clang__) /* https://bugs.llvm.org/show_bug.cgi?id=43275 */ ||  \
-     !defined(__cplusplus) || !__has_feature(cxx_exceptions))
+     !defined(__cplusplus) || __has_exceptions_disabled)
 #define MDBX_CONST_FUNCTION __attribute__((__const__))
 #else
 #define MDBX_CONST_FUNCTION MDBX_PURE_FUNCTION