Update README.md

README.md

@@ -22,7 +22,9 @@ We recommend users start with our [tutorial folder](https://github.com/som-shahl
 pip install femr
 
 # If you are using deep learning, you also need to install xformers
-# Note that xformers has some issues with MacOS. You might also need to install llvm. See https://stackoverflow.com/questions/60005176/how-to-deal-with-clang-error-unsupported-option-fopenmp-on-travis
+# 
+# Note that xformers has some known issues with MacOS. 
+# If you are using MacOS you might also need to install llvm. See https://stackoverflow.com/questions/60005176/how-to-deal-with-clang-error-unsupported-option-fopenmp-on-travis
 pip install xformers
 
 ```