diff --git a/03_vertex_buffer_objects/main.cpp b/03_vertex_buffer_objects/main.cpp
index 760e582..9c4b19d 100644
--- a/03_vertex_buffer_objects/main.cpp
+++ b/03_vertex_buffer_objects/main.cpp
@@ -108,7 +108,7 @@ int main() {
   if ( GL_TRUE != params ) {
     fprintf( stderr, "ERROR: could not link shader programme GL index %i\n", shader_programme );
     print_programme_info_log( shader_programme );
-    return false;
+    return 1;
   }
 
   glEnable( GL_CULL_FACE ); // cull face
diff --git a/13_mesh_import/Makefile.osx b/13_mesh_import/Makefile.osx
index 8c16548..21c0655 100644
--- a/13_mesh_import/Makefile.osx
+++ b/13_mesh_import/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = meshimp
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/15_phongtextures/Makefile.osx b/15_phongtextures/Makefile.osx
index 8fcb01f..29bbd59 100644
--- a/15_phongtextures/Makefile.osx
+++ b/15_phongtextures/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = phongtex
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/19_fog/Makefile.osx b/19_fog/Makefile.osx
index ad2dba8..fdab7fa 100644
--- a/19_fog/Makefile.osx
+++ b/19_fog/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = fog
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/20_normal_mapping/Makefile.osx b/20_normal_mapping/Makefile.osx
index 1ecf063..40023c5 100644
--- a/20_normal_mapping/Makefile.osx
+++ b/20_normal_mapping/Makefile.osx
@@ -2,7 +2,7 @@ BIN = nmap
 CC = clang++
 FLAGS = -DAPPLE -Wall -pedantic
 INC = -I/sw/include -I/usr/local/include
-LIBS = -lGLEW -lglfw -lassimp
+LIBS = -lGLEW -lglfw -lassimp -std=C++11
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
 SRC = main.cpp maths_funcs.cpp gl_utils.cpp 
 
diff --git a/21_cube_mapping/Makefile.osx b/21_cube_mapping/Makefile.osx
index 92b3dbb..37c8995 100644
--- a/21_cube_mapping/Makefile.osx
+++ b/21_cube_mapping/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = cubemap
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/28_uniform_buffer_object/Makefile.osx b/28_uniform_buffer_object/Makefile.osx
index 92b3dbb..37c8995 100644
--- a/28_uniform_buffer_object/Makefile.osx
+++ b/28_uniform_buffer_object/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = cubemap
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/30_skinning_part_one/Makefile.osx b/30_skinning_part_one/Makefile.osx
index dc22311..f576512 100644
--- a/30_skinning_part_one/Makefile.osx
+++ b/30_skinning_part_one/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = skin
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/31_skinning_part_two/Makefile.osx b/31_skinning_part_two/Makefile.osx
index dc22311..f576512 100644
--- a/31_skinning_part_two/Makefile.osx
+++ b/31_skinning_part_two/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = skin
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit
diff --git a/32_skinning_part_three/Makefile.osx b/32_skinning_part_three/Makefile.osx
index dc22311..f576512 100644
--- a/32_skinning_part_three/Makefile.osx
+++ b/32_skinning_part_three/Makefile.osx
@@ -1,6 +1,6 @@
 BIN = skin
 CC = clang++
-FLAGS = -DAPPLE -Wall -pedantic
+FLAGS = -DAPPLE -Wall -pedantic -std=C++11
 INC = -I/sw/include -I/usr/local/include
 LIBS = -lGLEW -lglfw -lassimp
 FRAMEWORKS = -framework Cocoa -framework OpenGL -framework IOKit