diff --git a/src/cocoa_platform.h b/src/cocoa_platform.h
index 15c21696..e979396c 100644
--- a/src/cocoa_platform.h
+++ b/src/cocoa_platform.h
@@ -121,6 +121,7 @@ typedef struct _GLFWwindowNS
     id              layer;
 
     GLFWbool        maximized;
+    GLFWbool        occluded;
     GLFWbool        retina;
 
     // Cached window properties to filter out duplicate events
diff --git a/src/cocoa_window.m b/src/cocoa_window.m
index 129e975e..17f34733 100644
--- a/src/cocoa_window.m
+++ b/src/cocoa_window.m
@@ -322,6 +322,14 @@ static const NSRange kEmptyRange = { NSNotFound, 0 };
     _glfwInputWindowFocus(window, GLFW_FALSE);
 }
 
+- (void)windowDidChangeOcclusionState:(NSNotification* )notification
+{
+    if ([window->ns.object occlusionState] & NSWindowOcclusionStateVisible)
+        window->ns.occluded = GLFW_FALSE;
+    else
+        window->ns.occluded = GLFW_TRUE;
+}
+
 @end
 
 
diff --git a/src/nsgl_context.m b/src/nsgl_context.m
index 3bcfafcc..10286849 100644
--- a/src/nsgl_context.m
+++ b/src/nsgl_context.m
@@ -51,7 +51,7 @@ static void swapBuffersNSGL(_GLFWwindow* window)
 
     // HACK: Simulate vsync with usleep as NSGL swap interval does not apply to
     //       windows with a non-visible occlusion state
-    if (!([window->ns.object occlusionState] & NSWindowOcclusionStateVisible))
+    if (window->ns.occluded)
     {
         int interval = 0;
         [window->context.nsgl.object getValues:&interval