diff --git a/React/CoreModules/RCTAlertController.h b/React/CoreModules/RCTAlertController.h
new file mode 100644
index 0000000000..cd55e325a1
--- /dev/null
+++ b/React/CoreModules/RCTAlertController.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <React/RCTUIKit.h> // TODO(macOS ISS#2323203)
+
+#if TARGET_OS_OSX // [TODO(macOS ISS#2323203)
+@interface RCTAlertController : NSViewController
+#else
+@interface RCTAlertController : UIAlertController
+#endif // ]TODO(macOS ISS#2323203)
+
+#if !TARGET_OS_OSX // [TODO(macOS ISS#2323203)
+- (void)show:(BOOL)animated completion:(void (^)(void))completion;
+#endif // ]TODO(macOS ISS#2323203)
+
+@end
diff --git a/React/CoreModules/RCTAlertController.m b/React/CoreModules/RCTAlertController.m
new file mode 100644
index 0000000000..514c543edd
--- /dev/null
+++ b/React/CoreModules/RCTAlertController.m
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+#import <React/RCTUtils.h>
+
+#import "RCTAlertController.h"
+
+@interface RCTAlertController ()
+
+#if !TARGET_OS_OSX // [TODO(macOS ISS#2323203)
+@property (nonatomic, strong) UIWindow *alertWindow;
+#endif // ]TODO(macOS ISS#2323203)
+
+@end
+
+@implementation RCTAlertController
+
+#if !TARGET_OS_OSX // [TODO(macOS ISS#2323203)
+- (UIWindow *)alertWindow
+{
+  if (_alertWindow == nil) {
+    _alertWindow = [[UIWindow alloc] initWithFrame:RCTSharedApplication().keyWindow.bounds];
+    _alertWindow.rootViewController = [UIViewController new];
+    _alertWindow.windowLevel = UIWindowLevelAlert + 1;
+  }
+  return _alertWindow;
+}
+
+- (void)show:(BOOL)animated completion:(void (^)(void))completion
+{
+  [self.alertWindow makeKeyAndVisible];
+  [self.alertWindow.rootViewController presentViewController:self animated:animated completion:completion];
+}
+#endif // ]TODO(macOS ISS#2323203)
+
+@end
diff --git a/React/CoreModules/RCTAlertManager.mm b/React/CoreModules/RCTAlertManager.mm
index fafafc3e7c..b2cc12c7ff 100644
--- a/React/CoreModules/RCTAlertManager.mm
+++ b/React/CoreModules/RCTAlertManager.mm
@@ -15,6 +15,7 @@
 #import <React/RCTUtils.h>
 
 #import "CoreModulesPlugins.h"
+#import "RCTAlertController.h"
 
 @implementation RCTConvert (UIAlertViewStyle)
 
@@ -115,29 +116,9 @@ RCT_EXPORT_METHOD(alertWithArgs : (JS::NativeAlertManager::Args &)args callback
     }
   }
 
-  UIViewController *presentingController = RCTPresentedViewController();
-  if (presentingController == nil) {
-    RCTLogError(@"Tried to display alert view but there is no application window. args: %@", @{
-      @"title" : args.title() ?: [NSNull null],
-      @"message" : args.message() ?: [NSNull null],
-      @"buttons" : RCTConvertOptionalVecToArray(
-          args.buttons(),
-          ^id(id<NSObject> element) {
-            return element;
-          })
-          ?: [NSNull null],
-      @"type" : args.type() ?: [NSNull null],
-      @"defaultValue" : args.defaultValue() ?: [NSNull null],
-      @"cancelButtonKey" : args.cancelButtonKey() ?: [NSNull null],
-      @"destructiveButtonKey" : args.destructiveButtonKey() ?: [NSNull null],
-      @"keyboardType" : args.keyboardType() ?: [NSNull null],
-    });
-    return;
-  }
-
-  UIAlertController *alertController = [UIAlertController alertControllerWithTitle:title
-                                                                           message:nil
-                                                                    preferredStyle:UIAlertControllerStyleAlert];
+  RCTAlertController *alertController = [RCTAlertController alertControllerWithTitle:title
+                                                                             message:nil
+                                                                      preferredStyle:UIAlertControllerStyleAlert];
   switch (type) {
     case RCTAlertViewStylePlainTextInput: {
       [alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
@@ -186,7 +167,7 @@ RCT_EXPORT_METHOD(alertWithArgs : (JS::NativeAlertManager::Args &)args callback
     } else if ([buttonKey isEqualToString:destructiveButtonKey]) {
       buttonStyle = UIAlertActionStyleDestructive;
     }
-    __weak UIAlertController *weakAlertController = alertController;
+    __weak RCTAlertController *weakAlertController = alertController;
     [alertController
         addAction:[UIAlertAction
                       actionWithTitle:buttonTitle
@@ -218,7 +199,7 @@ RCT_EXPORT_METHOD(alertWithArgs : (JS::NativeAlertManager::Args &)args callback
   [_alertControllers addObject:alertController];
 
   dispatch_async(dispatch_get_main_queue(), ^{
-    [presentingController presentViewController:alertController animated:YES completion:nil];
+    [alertController show:YES completion:nil];
   });
 #else // [TODO(macOS ISS#2323203)