Fix; Read me

Author: 1yam

README.md

@@ -20,7 +20,8 @@ $ apt-get install -y python3-pip libsecp256k1-dev
 ```
 Using some chains may also require installing `libgmp3-dev`.
 
-### macOs 
+### macOs
+This project does not support Python 3.12 on macOS. Please use Python 3.11 instead.
 ```shell
 $ brew tap cuber/homebrew-libsecp256k1
 $ brew install libsecp256k1