update docs to make tinygrad usage clearer

README.md

@@ -148,6 +148,26 @@ curl http://localhost:8000/v1/chat/completions \
    }'
 ```
 
+### Example Usage on Multiple Heterogenous Devices (MacOS + Linux)
+
+#### Device 1 (MacOS):
+
+```sh
+python3 main.py --inference-engine tinygrad
+```
+
+Here we explicitly tell exo to use the **tinygrad** inference engine.
+
+#### Device 2 (Linux):
+```sh
+python3 main.py
+```
+
+Linux devices will automatically default to using the **tinygrad** inference engine.
+
+You can read about tinygrad-specific env vars [here](https://docs.tinygrad.org/env_vars/). For example, you can configure tinygrad to use the cpu by specifying `CLANG=1`.
+
+
 ## Debugging
 
 Enable debug logs with the DEBUG environment variable (0-9).
@@ -156,6 +176,12 @@ Enable debug logs with the DEBUG environment variable (0-9).
 DEBUG=9 python3 main.py
 ```
 
+For the **tinygrad** inference engine specifically, there is a separate DEBUG flag `TINYGRAD_DEBUG` that can be used to enable debug logs (1-6).
+
+```sh
+TINYGRAD_DEBUG=2 python3 main.py
+```
+
 ## Known Issues
 
 - 🚧 As the library is evolving so quickly, the iOS implementation has fallen behind Python. We have decided for now not to put out the buggy iOS version and receive a bunch of GitHub issues for outdated code. We are working on solving this properly and will make an announcement when it's ready. If you would like access to the iOS implementation now, please email alex@exolabs.net with your GitHub username explaining your use-case and you will be granted access on GitHub.