diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index c86cc0e79..a8d8635f2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -73,6 +73,10 @@ if(${PLATFORM} MATCHES "Desktop")
     find_library(OPENGL_LIBRARY OpenGL)
     set(LIBS_PRIVATE ${OPENGL_LIBRARY})
     link_libraries("${LIBS_PRIVATE}")
+    if (NOT CMAKE_SYSTEM STRLESS "Darwin-18.0.0")
+      add_definitions(-DGL_SILENCE_DEPRECATION)
+      MESSAGE(AUTHOR_WARNING "OpenGL is deprecated starting with macOS 10.14 (Mojave)!")
+    endif()
   elseif(WIN32)
     add_definitions(-D_CRT_SECURE_NO_WARNINGS)
   else()
diff --git a/src/core.c b/src/core.c
index 203da4d9b..558cc854e 100644
--- a/src/core.c
+++ b/src/core.c
@@ -134,12 +134,6 @@
     #define CHDIR chdir
 #endif
 
-#if defined(__linux__) || defined(PLATFORM_WEB)
-    #include <sys/time.h>           // Required for: timespec, nanosleep(), select() - POSIX
-#elif defined(__APPLE__)
-    #include <unistd.h>             // Required for: usleep()
-#endif
-
 #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_WEB)
     #if defined(PLATFORM_WEB)
         #define GLFW_INCLUDE_ES2
@@ -155,6 +149,15 @@
     #endif
 #endif
 
+#if defined(__linux__) || defined(PLATFORM_WEB)
+    #include <sys/time.h>           // Required for: timespec, nanosleep(), select() - POSIX
+#elif defined(__APPLE__)
+    #include <unistd.h>             // Required for: usleep()
+    #include <objc/message.h>       // Required for: objc_msgsend(), sel_registerName()
+    #define GLFW_EXPOSE_NATIVE_NSGL
+    #include <GLFW/glfw3native.h>   // Required for: glfwGetNSGLContext()
+#endif
+
 #if defined(PLATFORM_ANDROID)
     //#include <android/sensor.h>           // Android sensors functions (accelerometer, gyroscope, light...)
     #include <android/window.h>             // Defines AWINDOW_FLAG_FULLSCREEN and others
@@ -233,6 +236,11 @@ static bool windowReady = false;                // Check if window has been init
 static bool windowMinimized = false;            // Check if window has been minimized
 static const char *windowTitle = NULL;          // Window text title...
 
+#if defined(__APPLE__)
+static int windowNeedsUpdating = 2;             // Times the Cocoa window needs to be updated initially
+#endif
+
+
 #if defined(PLATFORM_ANDROID)
 static struct android_app *androidApp;          // Android activity
 static struct android_poll_source *source;      // Android events polling source
@@ -2870,6 +2878,15 @@ static void SwapBuffers(void)
 {
 #if defined(PLATFORM_DESKTOP) || defined(PLATFORM_WEB)
     glfwSwapBuffers(window);
+#if __APPLE__
+    // workaround for missing/erroneous initial rendering on macOS
+    if (windowNeedsUpdating) {
+        // Desugared version of Objective C: [glfwGetNSGLContext(window) update]
+        ((id (*)(id, SEL))objc_msgSend)(glfwGetNSGLContext(window),
+                                        sel_registerName("update"));
+        windowNeedsUpdating--;
+    }
+#endif
 #endif
 
 #if defined(PLATFORM_ANDROID) || defined(PLATFORM_RPI) || defined(PLATFORM_UWP)
diff --git a/src/raylib.h b/src/raylib.h
index 17c4234e3..20a3ca267 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -354,11 +354,11 @@
 //----------------------------------------------------------------------------------
 // Structures Definition
 //----------------------------------------------------------------------------------
-#ifndef __cplusplus
 // Boolean type
-    #ifndef bool
-        typedef enum { false, true } bool;
-    #endif
+#if defined(__STDC__) && __STDC_VERSION__ >= 199901L
+    #include <stdbool.h>
+#elif !defined(__cplusplus) && !defined(bool)
+    typedef enum { false, true } bool;
 #endif
 
 // Vector2 type