diff --git a/apps/ospExamples/GLFWOSPRayWindow.cpp b/apps/ospExamples/GLFWOSPRayWindow.cpp
index 4e4ef1ab7..e040b4711 100644
--- a/apps/ospExamples/GLFWOSPRayWindow.cpp
+++ b/apps/ospExamples/GLFWOSPRayWindow.cpp
@@ -164,7 +164,7 @@ GLFWOSPRayWindow::GLFWOSPRayWindow(
 
   glfwWindowHint(GLFW_SRGB_CAPABLE, GLFW_TRUE);
   glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-#ifdef __APPLE_
+#ifdef __APPLE__
   glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
   glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
   const char *glslVersion = "#version 150";
diff --git a/modules/mpi/tutorials/GLFWDistribOSPRayWindow.cpp b/modules/mpi/tutorials/GLFWDistribOSPRayWindow.cpp
index 1f1cab857..fbc77dfd5 100644
--- a/modules/mpi/tutorials/GLFWDistribOSPRayWindow.cpp
+++ b/modules/mpi/tutorials/GLFWDistribOSPRayWindow.cpp
@@ -55,7 +55,7 @@ GLFWDistribOSPRayWindow::GLFWDistribOSPRayWindow(const vec2i &windowSize,
 
     glfwWindowHint(GLFW_SRGB_CAPABLE, GLFW_TRUE);
     glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-#ifdef __APPLE_
+#ifdef __APPLE__
     glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
     glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
     const char *glslVersion = "#version 150";