Update README.md (#33)

Author: DavidePaglieri

README.md

@@ -26,6 +26,7 @@ cd BALROG
 pip install -e .
 balrog-post-install
 ```
+On Mac make sure you have `wget` installed for the `balrog-post-install`
 
 ## Docker
 We have provided some docker images. Please see the [relevant README](docker/README.md).
@@ -47,6 +48,11 @@ python eval.py \
   client.base_url=http://0.0.0.0:8080/v1
 ```
 
+On Mac you might have to first export the following to suppress some fork() errors:
+```
+export OBJC_DISABLE_INITIALIZE_FORK_SAFETY=YES
+```
+
 Check out [vLLM](https://github.com/vllm-project/vllm) for more options on how to serve your models fast and efficiently.
 
 ## 🛜 Evaluate using popular APIs