specify AppleClang >= 9.0

docs/Installation-Guide.rst

@@ -87,10 +87,10 @@ Also you may want to read `gcc Tips <./gcc-Tips.rst>`__.
 macOS
 ~~~~~
 
-LightGBM can use Apple Clang, or GCC/G++ to build in macOS.
+LightGBM can use Apple Clang (9.0 or higher), or GCC/G++ to build in macOS.
 
-Apple Clang
-***********
+Apple Clang (9.0 or higher)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 1. Install `CMake`_ (3.12 or higher).
 
@@ -105,7 +105,7 @@ Apple Clang
      make -j4
 
 GCC/G++
-*******
+^^^^^^^
 
 Please install **gcc/g++** by using the following commands:
 
@@ -348,7 +348,25 @@ LightGBM uses **CMake** to build. Run the following commands:
 macOS
 ^^^^^
 
-LightGBM depends on **OpenMP** for compiling, which isn't supported by Apple Clang.
+LightGBM can use Apple Clang (9.0 or higher), or GCC/G++ to build in macOS.
+
+Apple Clang (9.0 or higher)
+***************************
+
+1. Install `CMake`_ (3.12 or higher).
+
+2. Run the following commands:
+
+   .. code::
+
+     brew install libomp
+     git clone --recursive https://github.com/Microsoft/LightGBM ; cd LightGBM
+     mkdir build ; cd build
+     cmake -DUSE_HDFS=ON ..
+     make -j4
+
+GCC/G++
+*******
 
 Please install **gcc/g++** by using the following commands: