diff --git a/README b/README
index 592643067..0be9947d5 100644
--- a/README
+++ b/README
@@ -121,7 +121,7 @@ Supported, "platform" surface backends
 
 	quartz backend
 	--------------
-	MacOS X >= 10.4 with Xcode >= 2.4
+	MacOS X >= 10.5 with Xcode >= 3.0
 
 	win32 backend
 	-------------