diff --git a/src/include/OpenImageIO/detail/fmt.h b/src/include/OpenImageIO/detail/fmt.h
index 111b0d5b8e..3f93aececa 100644
--- a/src/include/OpenImageIO/detail/fmt.h
+++ b/src/include/OpenImageIO/detail/fmt.h
@@ -52,6 +52,11 @@ OIIO_PRAGMA_WARNING_PUSH
 #if OIIO_CLANG_VERSION >= 180000
 #    pragma clang diagnostic ignored "-Wdeprecated-declarations"
 #endif
+#if OIIO_APPLE_CLANG_VERSION >= 210000
+#    pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#    pragma clang diagnostic ignored "-Wformat-nonliteral"
+#    pragma clang diagnostic ignored "-Wdeprecated-literal-operator"
+#endif
 
 #include <OpenImageIO/detail/fmt/format.h>
 #include <OpenImageIO/detail/fmt/ostream.h>