diff --git a/README.md b/README.md
index daa1be9c..57206a06 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,7 @@ information on what to include when reporting a bug.
  - [Cocoa] Bugfix: `glfwSetWindowSize` used a bottom-left anchor point (#1553)
  - [Cocoa] Bugfix: Window remained on screen after destruction until event poll
    (#1412)
+ - [Cocoa] Bugfix: Event processing before window creation would assert (#1543)
  - [X11] Bugfix: The CMake files did not check for the XInput headers (#1480)
  - [X11] Bugfix: Key names were not updated when the keyboard layout changed
    (#1462,#1528)
diff --git a/src/cocoa_init.m b/src/cocoa_init.m
index 70e45216..7e75299a 100644
--- a/src/cocoa_init.m
+++ b/src/cocoa_init.m
@@ -447,9 +447,9 @@ static GLFWbool initializeTIS(void)
 
 - (void)applicationDidFinishLaunching:(NSNotification *)notification
 {
-    [NSApp stop:nil];
-
+    _glfw.ns.finishedLaunching = GLFW_TRUE;
     _glfwPlatformPostEmptyEvent();
+    [NSApp stop:nil];
 }
 
 - (void)applicationDidHide:(NSNotification *)notification
diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index bfec8b7b..3d55d6d7 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -891,10 +891,7 @@ int _glfwPlatformCreateWindow(_GLFWwindow* window,
     @autoreleasepool {
 
     if (!_glfw.ns.finishedLaunching)
-    {
         [NSApp run];
-        _glfw.ns.finishedLaunching = GLFW_TRUE;
-    }
 
     if (!createNativeWindow(window, wndconfig, fbconfig))
         return GLFW_FALSE;
@@ -1385,6 +1382,9 @@ void _glfwPlatformPollEvents(void)
 {
     @autoreleasepool {
 
+    if (!_glfw.ns.finishedLaunching)
+        [NSApp run];
+
     for (;;)
     {
         NSEvent* event = [NSApp nextEventMatchingMask:NSEventMaskAny
@@ -1404,6 +1404,9 @@ void _glfwPlatformWaitEvents(void)
 {
     @autoreleasepool {
 
+    if (!_glfw.ns.finishedLaunching)
+        [NSApp run];
+
     // I wanted to pass NO to dequeue:, and rely on PollEvents to
     // dequeue and send.  For reasons not at all clear to me, passing
     // NO to dequeue: causes this method never to return.
@@ -1422,6 +1425,9 @@ void _glfwPlatformWaitEventsTimeout(double timeout)
 {
     @autoreleasepool {
 
+    if (!_glfw.ns.finishedLaunching)
+        [NSApp run];
+
     NSDate* date = [NSDate dateWithTimeIntervalSinceNow:timeout];
     NSEvent* event = [NSApp nextEventMatchingMask:NSEventMaskAny
                                         untilDate:date
@@ -1439,6 +1445,9 @@ void _glfwPlatformPostEmptyEvent(void)
 {
     @autoreleasepool {
 
+    if (!_glfw.ns.finishedLaunching)
+        [NSApp run];
+
     NSEvent* event = [NSEvent otherEventWithType:NSEventTypeApplicationDefined
                                         location:NSMakePoint(0, 0)
                                    modifierFlags:0