diff --git a/README.md b/README.md
index 30d79c2..1519801 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,11 @@ and made during the first tangible clouds worksession 18th → 21st May 2022 in
 (https://tangible-cloud.be/)
 
 
-# usage: chmod all .sh files, be on the same network and run ./netchatte.sh
+## Usage 
+chmod all .sh files, be on the same network and run ./netchatte.sh
 
+## Notes
+Tested on OSX Catalina and ... (both ship with BSD version of Netcat from 2001 and Screen version 4.00.03 (FAU) 23-Oct-06 )