diff --git a/examples/viewer/Makefile b/examples/viewer/Makefile
deleted file mode 100644
index d42278c..0000000
--- a/examples/viewer/Makefile
+++ /dev/null
@@ -1,66 +0,0 @@
-CXX_FLAGS=-O0 -g -Wno-deprecated-declarations
-
-ifndef PLATFORM
-UNAME=$(shell uname -s)
-
-# OSX TEST
-ifeq ($(UNAME),Darwin)
-PLATFORM=OSX
-else
-# WINDOWS MINGW TEST
-ifeq ($(findstring MINGW, $(UNAME)), MINGW)
-	PLATFORM=WINDOWS_MINGW
-else
-# ASSUME LINUX
-	PLATFORM=LINUX
-endif
-endif
-
-endif
-$(info PLATFORM SELECTED:	$(PLATFORM))
-
-ifeq ($(PLATFORM),OSX)
-# OSX CONFIGURATION-------------------------------------------------------------
-CXX_FLAGS+= -fsanitize=address
-GLFW_INC=-I/usr/local/include 
-GLFW_LIB_DIR=/usr/local/lib
-GLFW_LIBS=-L$(GLFW_LIB_DIR) -lglfw3 -lGLEW
-GL_LIBS=-framework OpenGL
-# /OSX CONFIGURATION------------------------------------------------------------
-else
-ifeq ($(PLATFORM),LINUX)
-# LINUX CONFIGURATION-----------------------------------------------------------
-CXX_FLAGS+= -fsanitize=address
-GLFW_INC=-I/usr/local/include 
-GLFW_LIB_DIR=/usr/local/lib
-GLFW_LIBS=-L$(GLFW_LIB_DIR) -lglfw3 -lGLEW
-GL_LIBS=-lGL -lGLU -lX11 -lXrandr -lXi -lXxf86vm -lXcursor -lXinerama -ldl -pthread
-# /LINUX CONFIGURATION----------------------------------------------------------
-else
-ifeq ($(PLATFORM),WINDOWS_MINGW)
-# WINDOWS MINGW CONFIGURATION---------------------------------------------------
-# Since Windows unfortunately doesn't have any defacto directories for third 
-# party libraries, we'll have to force the user to give us them. So we check 
-# that the user passed in GLFW-dirs in some way, via flag or environ.
-ifndef GLFW_DIR
-$(error NO GLFW_DIR SPECIFIED. PASS GLFW_DIR=<dir> TO MAKE)
-endif 
-ifndef GLEW_DIR
-$(error NO GLEW_DIR SPECIFIED. PASS GLEW_DIR=<dir> TO MAKE)
-endif
-GLFW_INC=-I$(GLFW_DIR)/include
-GLFW_LIB_DIR=$(GLFW_DIR)/lib-mingw-w64
-GLFW_LIBS= -lglfw3 -L$(GLFW_LIB_DIR)
-GL_LIBS=   -lglew32 -lopengl32 -lglu32 -lgdi32 -I$(GLEW_DIR)/include -L$(GLEW_DIR)/bin/Release/x64
-# /WINDOWS CONFIGURATION--------------------------------------------------------
-else
-$(error UNKNOWN PLATFORM "$(PLATFORM)")
-endif #ifeq ($(PLATFORM),WINDOWS_MINGW)
-endif #ifeq ($(PLATFORM),LINUX)
-endif #ifeq ($(PLATFORM),OSX)
-
-all:
-	g++ -o objviewer $(CXX_FLAGS) viewer.cc ../../tiny_obj_loader.cc trackball.cc $(GLFW_INC)  $(GLFW_LIBS) $(GL_LIBS)
-ifeq ($(PLATFORM), WINDOWS_MINGW)
-	cp $(GLEW_DIR)/bin/Release/x64/glew32.dll .
-endif
diff --git a/examples/viewer/README.md b/examples/viewer/README.md
index 8cb41c1..79e544e 100644
--- a/examples/viewer/README.md
+++ b/examples/viewer/README.md
@@ -1,10 +1,31 @@
 # Simple .obj viewer with glew + glfw3 + OpenGL
 
+## Requirements
+
+* premake5
+* glfw3
+* glew
+
+
+## Build on MaCOSX
+
+Install glfw3 and glew using brew.
+Then,
+
+    $ premake5 gmake
+    $ make
+
+## Build on Linux
+
+Set `PKG_CONFIG_PATH` or Edit path to glfw3 and glew in `premake4.lua`
+
+Then,
+
+    $ premake5 gmake
+    $ make
+
 ## Build on Windows.
 
-### Requirements
-
-* premake5
 * Visual Studio 2013
 * Windows 64bit
   * 32bit may work.