readme : add note about macOS

Author: ggerganov

README.md

@@ -87,6 +87,9 @@ The plugin requires a [llama.cpp](https://github.com/ggerganov/llama.cpp) server
 
 ```bash
 brew install llama.cpp
+
+# for extra performance, disable the GPU's wired collector (https://github.com/ggerganov/llama.cpp/pull/10119)
+sudo sysctl iogpu.disable_wired_collector=1
 ```
 
 #### Any other OS