README.md in lightgbm-0.1.5 vs README.md in lightgbm-0.1.6

@@ -12,10 +12,10 @@
 
 ```ruby
 gem 'lightgbm'
 ```
 
-LightGBM is packaged with the gem, so no need to install it separately. On Mac, also run:
+On Mac, also install OpenMP:
 
 ```sh
 brew install libomp
 ```