diff --git a/README.md b/README.md
index 381bad637..0d46f40fb 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,8 @@ The repository contains the Arduino APIs and IDE integration files targeting a g
 
 ## Installation
 
+Note: 
+
 ### Clone the repository in `$sketchbook/hardware/arduino-git`
 
 ```bash
@@ -45,7 +47,7 @@ To install ARM build tools, use the `Boards Manager` option in the Arduino IDE t
 
 ## mbed-os-to-arduino script
 
-The backbone of the packaging process is the https://github.com/arduino/ArduinoCore-mbed/blob/master/mbed-os-to-arduino script. It basically compiles a blank Mbed OS project for any supported target board, recovering the files that will be needed at compile time and copying them to the right location.
+The backbone of the packaging process is the https://github.com/arduino/ArduinoCore-mbed/blob/master/mbed-os-to-arduino script. It basically compiles a blank Mbed OS project for any supported target board, recovering the files that will be needed at compile time and copying them to the right location. This script is not compatible with MacOS, it must be run on Linux.
 
 It can be used for a variety of tasks including: