diff --git a/conans/client/conf/__init__.py b/conans/client/conf/__init__.py
index a6b0794a330..14dbfb5590e 100644
--- a/conans/client/conf/__init__.py
+++ b/conans/client/conf/__init__.py
@@ -42,7 +42,7 @@
         version: ["3.3", "3.4", "3.5", "3.6", "3.7", "3.8", "3.9", "4.0"]
         libcxx: [libstdc++, libstdc++11, libc++]
     apple-clang:
-        version: ["5.0", "5.1", "6.0", "6.1", "7.0", "7.3", "8.0", "8.1"]
+        version: ["5.0", "5.1", "6.0", "6.1", "7.0", "7.3", "8.0", "8.1", "9.0"]
         libcxx: [libstdc++, libc++]
 
 build_type: [None, Debug, Release]