diff --git a/dev/a11y_assessments/macos/Runner/AppDelegate.swift b/dev/a11y_assessments/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/a11y_assessments/macos/Runner/AppDelegate.swift
+++ b/dev/a11y_assessments/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/benchmarks/complex_layout/macos/Runner/AppDelegate.swift b/dev/benchmarks/complex_layout/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/benchmarks/complex_layout/macos/Runner/AppDelegate.swift
+++ b/dev/benchmarks/complex_layout/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/benchmarks/macrobenchmarks/macos/Runner/AppDelegate.swift b/dev/benchmarks/macrobenchmarks/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/benchmarks/macrobenchmarks/macos/Runner/AppDelegate.swift
+++ b/dev/benchmarks/macrobenchmarks/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/integration_tests/channels/macos/Runner/AppDelegate.swift b/dev/integration_tests/channels/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/integration_tests/channels/macos/Runner/AppDelegate.swift
+++ b/dev/integration_tests/channels/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/integration_tests/flavors/macos/Runner/AppDelegate.swift b/dev/integration_tests/flavors/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/integration_tests/flavors/macos/Runner/AppDelegate.swift
+++ b/dev/integration_tests/flavors/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/integration_tests/flutter_gallery/macos/Runner/AppDelegate.swift b/dev/integration_tests/flutter_gallery/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/integration_tests/flutter_gallery/macos/Runner/AppDelegate.swift
+++ b/dev/integration_tests/flutter_gallery/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/integration_tests/ui/macos/Runner/AppDelegate.swift b/dev/integration_tests/ui/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/integration_tests/ui/macos/Runner/AppDelegate.swift
+++ b/dev/integration_tests/ui/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/dev/manual_tests/macos/Runner/AppDelegate.swift b/dev/manual_tests/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/dev/manual_tests/macos/Runner/AppDelegate.swift
+++ b/dev/manual_tests/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/api/macos/Runner/AppDelegate.swift b/examples/api/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/api/macos/Runner/AppDelegate.swift
+++ b/examples/api/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/flutter_view/macos/Runner/AppDelegate.swift b/examples/flutter_view/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/flutter_view/macos/Runner/AppDelegate.swift
+++ b/examples/flutter_view/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/hello_world/macos/Runner/AppDelegate.swift b/examples/hello_world/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/hello_world/macos/Runner/AppDelegate.swift
+++ b/examples/hello_world/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/image_list/macos/Runner/AppDelegate.swift b/examples/image_list/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/image_list/macos/Runner/AppDelegate.swift
+++ b/examples/image_list/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/layers/macos/Runner/AppDelegate.swift b/examples/layers/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/layers/macos/Runner/AppDelegate.swift
+++ b/examples/layers/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/platform_channel/macos/Runner/AppDelegate.swift b/examples/platform_channel/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/platform_channel/macos/Runner/AppDelegate.swift
+++ b/examples/platform_channel/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true
diff --git a/examples/platform_view/macos/Runner/AppDelegate.swift b/examples/platform_view/macos/Runner/AppDelegate.swift
index d080d41951d3..73cc5fd1077c 100644
--- a/examples/platform_view/macos/Runner/AppDelegate.swift
+++ b/examples/platform_view/macos/Runner/AppDelegate.swift
@@ -5,7 +5,7 @@
 import Cocoa
 import FlutterMacOS
 
-@NSApplicationMain
+@main
 class AppDelegate: FlutterAppDelegate {
   override func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
     return true