change readme

Author: leejw51crypto

README.md

@@ -49,16 +49,18 @@ The following build events are included in the project file:
 - Post-Build event (`demo`): `copy $(ProjectDir)lib\play_cpp_sdk.dll $(TargetDir)`
 
 ### Mac
-1. Clone the current repository
+1. Clone the current repository 
     ``` sh
     git clone https://github.com/crypto-com/play-cpp-sdk.git
     ```
 2. Unzip the archive file into `demo` folder
-3. Copy the dynamic library to `/usr/local/lib`
+3. Copy the dynamic library to your dylib folder, for example $HOME/lib
     ``` sh
     cd demo
-    cp lib/libplay_cpp_sdk.dylib /usr/local/lib
+    cp lib/libplay_cpp_sdk.dylib $HOME/lib
+    export DYLD_LIBRARY_PATH=$HOME/lib
     ```
+    or add `-rpath $HOME/lib` in final gcc linker flags.
 4. Under `demo` folder and build the `demo` project
     ``` sh
     make