diff --git a/README.md b/README.md
index 3f41e34291ec18659b4f0ebcd7b28cce61140e91..2d88db10a4de48838d2b9372027ca2ebf6c1d1bf 100644
--- a/README.md
+++ b/README.md
@@ -28,6 +28,7 @@ cd video_prediction
 ```bash
 pip install -r requirements.txt
 ```
+Note: in macOS, make sure that bash >= 4.0 is used (needed for associative arrays in `download_model.sh` script).
 
 ### Use a Pre-trained Model
 - Download and preprocess a dataset (e.g. `bair`):