diff --git a/samples/breakout/.gitignore b/samples/breakout/.gitignore
index 0742738..667da26 100644
--- a/samples/breakout/.gitignore
+++ b/samples/breakout/.gitignore
@@ -1,3 +1,3 @@
-Pong
+Breakout
 profile.dtrace
 profile.spall
diff --git a/src/app/app.h b/src/app/app.h
index cf2b1df..890927e 100644
--- a/src/app/app.h
+++ b/src/app/app.h
@@ -282,7 +282,6 @@ ORCA_API void oc_init(void);
 ORCA_API void oc_terminate(void);
 
 ORCA_API bool oc_should_quit(void);
-ORCA_API void oc_cancel_quit(void);
 ORCA_API void oc_request_quit(void);
 
 ORCA_API void oc_set_cursor(oc_mouse_cursor cursor);
diff --git a/src/app/osx_app.m b/src/app/osx_app.m
index b0c6b35..f0e24a3 100644
--- a/src/app/osx_app.m
+++ b/src/app/osx_app.m
@@ -376,11 +376,9 @@ void oc_install_keyboard_layout_listener()
 {
     //NOTE: We set shouldQuit to true and send a Quit event
     //	We then return a value to cancel the direct termination because we still
-    //	want to execte the code after oc_event_loop(). If the user didn't set shouldQuit to
-    //	false, oc_event_loop() will exit, and the user can execute any cleanup needed and
-    //	exit the program.
+    //	want to execute cleanup code. Use can then call oc_request_quit() to exit
+    //  the main runloop
 
-    oc_appData.shouldQuit = true;
     oc_event event = {};
     event.type = OC_EVENT_QUIT;
     oc_queue_event(&event);
@@ -1162,9 +1160,21 @@ void oc_cancel_quit()
 void oc_request_quit()
 {
     oc_appData.shouldQuit = true;
-    oc_event event = {};
-    event.type = OC_EVENT_QUIT;
-    oc_queue_event(&event);
+
+    @autoreleasepool
+    {
+        NSEvent* event = [NSEvent otherEventWithType:NSEventTypeApplicationDefined
+                                            location:NSMakePoint(0, 0)
+                                       modifierFlags:0
+                                           timestamp:0.0
+                                        windowNumber:0
+                                             context:nil
+                                             subtype:0
+                                               data1:0
+                                               data2:0];
+
+        [NSApp postEvent:event atStart:NO];
+    }
 }
 
 void oc_set_cursor(oc_mouse_cursor cursor)
diff --git a/src/app/win32_app.c b/src/app/win32_app.c
index 45f1762..9e4248d 100644
--- a/src/app/win32_app.c
+++ b/src/app/win32_app.c
@@ -170,6 +170,8 @@ void oc_init()
         SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &wheelScrollLines, 0);
         oc_appData.win32.wheelScrollLines = wheelScrollLines;
 
+        oc_appData.win32.mainThreadID = GetCurrentThreadId();
+
         oc_vsync_init();
     }
 }
@@ -659,6 +661,7 @@ void oc_cancel_quit()
 void oc_request_quit()
 {
     oc_appData.shouldQuit = true;
+	PostThreadMessage(oc_appData.win32.mainThreadID, OC_WM_USER_WAKEUP, 0, 0);
 }
 
 void oc_pump_events(f64 timeout)
diff --git a/src/app/win32_app.h b/src/app/win32_app.h
index 481eeac..47f3779 100644
--- a/src/app/win32_app.h
+++ b/src/app/win32_app.h
@@ -43,6 +43,8 @@ typedef struct oc_win32_app_data
     u32 clickCount[OC_MOUSE_BUTTON_COUNT];
     u32 wheelScrollLines;
 
+    DWORD mainThreadID;
+
 } oc_win32_app_data;
 
 #define OC_PLATFORM_APP_DATA oc_win32_app_data win32;
@@ -50,6 +52,7 @@ typedef struct oc_win32_app_data
 enum OC_WM_USER
 {
     OC_WM_USER_DISPATCH_PROC = 0x0400, // WM_USER messages are defined from 0x400 to 0x7FFF
+    OC_WM_USER_WAKEUP = 0x0401,
 };
 
 #endif __WIN32_APP_H_
diff --git a/src/graphics/mtl_renderer.m b/src/graphics/mtl_renderer.m
index d66c2a7..10088bf 100644
--- a/src/graphics/mtl_renderer.m
+++ b/src/graphics/mtl_renderer.m
@@ -1368,6 +1368,10 @@ void oc_mtl_canvas_destroy(oc_canvas_backend* interface)
 
     @autoreleasepool
     {
+        id<MTLCommandBuffer> endBuffer = [backend->surface->commandQueue commandBuffer];
+        [endBuffer commit];
+        [endBuffer waitUntilCompleted];
+
         [backend->pathPipeline release];
         [backend->segmentPipeline release];
         [backend->backpropPipeline release];
diff --git a/src/runtime.c b/src/runtime.c
index 7f1bca9..538257c 100644
--- a/src/runtime.c
+++ b/src/runtime.c
@@ -195,6 +195,11 @@ void oc_bridge_log(oc_log_level level,
                msg);
 }
 
+void oc_bridge_request_quit(void)
+{
+    __orcaApp.quit = true;
+}
+
 typedef struct orca_surface_create_data
 {
     oc_window window;
@@ -543,7 +548,7 @@ i32 orca_runloop(void* user)
 
     oc_ui_set_context(&app->debugOverlay.ui);
 
-    while(!oc_should_quit())
+    while(!app->quit)
     {
         oc_event* event = 0;
         while((event = oc_next_event(oc_scratch())) != 0)
@@ -575,7 +580,7 @@ i32 orca_runloop(void* user)
             {
                 case OC_EVENT_WINDOW_CLOSE:
                 {
-                    oc_request_quit();
+                    app->quit = true;
                 }
                 break;
 
@@ -857,7 +862,7 @@ i32 orca_runloop(void* user)
         }
     }
 
-    app->quit = true;
+    oc_request_quit();
 
     return (0);
 }
@@ -902,7 +907,7 @@ int main(int argc, char** argv)
 
     oc_thread* runloopThread = oc_thread_create(orca_runloop, 0);
 
-    while(!app->quit)
+    while(!oc_should_quit())
     {
         oc_pump_events(-1);
         //TODO: what to do with mem scratch here?
diff --git a/src/util/macros.h b/src/util/macros.h
index 6fd9370..0b2bf41 100644
--- a/src/util/macros.h
+++ b/src/util/macros.h
@@ -110,6 +110,7 @@ inline T oc_cube(T a)
     // the def parameter must be a macro that takes a type, and optional arguments
 
     #if OC_COMPILER_CL
+        //NOTE: size_t conflicts with u64 on MSVC, whereas it is a distinct type on clang
         #define oc_tga_variants(def, ...)                                                                       \
             def(u8, ##__VA_ARGS__) def(i8, ##__VA_ARGS__) def(u16, ##__VA_ARGS__) def(i16, ##__VA_ARGS__)       \
                 def(u32, ##__VA_ARGS__) def(i32, ##__VA_ARGS__) def(u64, ##__VA_ARGS__) def(i64, ##__VA_ARGS__) \
diff --git a/src/wasmbind/core_api.json b/src/wasmbind/core_api.json
index 566cfb8..17c64ed 100644
--- a/src/wasmbind/core_api.json
+++ b/src/wasmbind/core_api.json
@@ -76,7 +76,7 @@
 },
 {
 	"name": "oc_request_quit",
-	"cname": "oc_request_quit",
+	"cname": "oc_bridge_request_quit",
 	"ret": {"name": "void", "tag": "v"},
 	"args": []
 },