diff --git a/Mac/Lib/test/readme.txt b/Mac/Lib/test/readme.txt
new file mode 100644
index 00000000000..dbf671f1f95
--- /dev/null
+++ b/Mac/Lib/test/readme.txt
@@ -0,0 +1,4 @@
+The files in this folder are not maintained very well. They have worked at some
+point in the past, but they may not work anymore. They may contain interesting
+information, but they could also very well contain misinformation. Use at your
+own risk.