diff --git a/src/app/core/platform/app_delegate.h b/src/app/core/platform/app_delegate.h
index 159aa3d7..a1e4aa56 100644
--- a/src/app/core/platform/app_delegate.h
+++ b/src/app/core/platform/app_delegate.h
@@ -51,7 +51,7 @@ void yaze_initialize_cocoa();
 /**
  * @brief Run the Cocoa application delegate.
  */
-void yaze_run_cocoa_app_delegate(const char *filename);
+int yaze_run_cocoa_app_delegate(const char *filename);
 
 #ifdef __cplusplus
 }  // extern "C"
diff --git a/src/app/core/platform/app_delegate.mm b/src/app/core/platform/app_delegate.mm
index 7c0237ac..de33e70e 100644
--- a/src/app/core/platform/app_delegate.mm
+++ b/src/app/core/platform/app_delegate.mm
@@ -236,20 +236,26 @@ extern "C" void yaze_initialize_cococa() {
   }
 }
 
-extern "C" void yaze_run_cocoa_app_delegate(const char *filename) {
+extern "C" int yaze_run_cocoa_app_delegate(const char *filename) {
   yaze_initialize_cococa();
   yaze::core::Controller controller;
-  RETURN_VOID_IF_ERROR(controller.OnEntry(filename));
+  EXIT_IF_ERROR(controller.OnEntry(filename));
   while (controller.IsActive()) {
     @autoreleasepool {
       controller.OnInput();
       if (auto status = controller.OnLoad(); !status.ok()) {
+        NSAlert *alert = [[NSAlert alloc] init];
+        [alert setMessageText:@"Error"];
+        [alert setInformativeText:[NSString stringWithUTF8String:status.message().data()]];
+        [alert addButtonWithTitle:@"OK"];
+        [alert runModal];
         break;
       }
       controller.DoRender();
     }
   }
   controller.OnExit();
+  return EXIT_SUCCESS;
 }
 
 #endif
diff --git a/src/app/main.cc b/src/app/main.cc
index b4ee0bb1..fcc98872 100644
--- a/src/app/main.cc
+++ b/src/app/main.cc
@@ -32,8 +32,7 @@ int main(int argc, char** argv) {
   }
 
 #ifdef __APPLE__
-  yaze_run_cocoa_app_delegate(rom_filename.c_str());
-  return EXIT_SUCCESS;
+  return yaze_run_cocoa_app_delegate(rom_filename.c_str());
 #elif defined(_WIN32)
   // We set SDL_MAIN_HANDLED for Win32 to avoid SDL hijacking main()
   SDL_SetMainReady();