diff --git a/units/en/unit7/hands-on.mdx b/units/en/unit7/hands-on.mdx
index bcd5f59..6049aa0 100644
--- a/units/en/unit7/hands-on.mdx
+++ b/units/en/unit7/hands-on.mdx
@@ -61,10 +61,10 @@ We're constantly trying to improve our tutorials, so **if you find some issues
 
 We advise you to use [conda](https://docs.conda.io/en/latest/) as a package manager and create a new environment.
 
-With conda, we create a new environment called rl:
+With conda, we create a new environment called rl with **Python 3.9**:
 
 ```bash
-conda create --name rl python=3.8
+conda create --name rl python=3.9
 conda activate rl
 ```
 
@@ -97,6 +97,7 @@ Windows: Download [this executable](https://drive.google.com/file/d/1sqFxbEdTMub
 Linux (Ubuntu): Download [this executable](https://drive.google.com/file/d/1KuqBKYiXiIcU4kNMqEzhgypuFP5_45CL/view?usp=sharing)
 
 Mac: Download [this executable](https://drive.google.com/drive/folders/1h7YB0qwjoxxghApQdEUQmk95ZwIDxrPG?usp=share_link)
+⚠ For Mac you need also to call this `xattr -cr training-envs-executables/SoccerTwos/SoccerTwos.app` to be able to run SoccerTwos
 
 ## Step 1: Understand the environment