Added failing integration test.

samples/IntegrationTestApp/MainWindow.axaml

@@ -139,6 +139,7 @@
               <ComboBoxItem Name="ShowWindowStateMaximized">Maximized</ComboBoxItem>
               <ComboBoxItem Name="ShowWindowStateFullScreen">FullScreen</ComboBoxItem>
             </ComboBox>
+            <CheckBox Name="ShowWindowCanResize" IsChecked="True">Can Resize</CheckBox>
             <Button Name="ShowWindow">Show Window</Button>
             <Button Name="SendToBack">Send to Back</Button>
             <Button Name="EnterFullscreen">Enter Fullscreen</Button>

samples/IntegrationTestApp/MainWindow.axaml.cs

@@ -66,11 +66,13 @@ namespace IntegrationTestApp
             var locationComboBox = this.GetControl<ComboBox>("ShowWindowLocation");
             var stateComboBox = this.GetControl<ComboBox>("ShowWindowState");
             var size = !string.IsNullOrWhiteSpace(sizeTextBox.Text) ? Size.Parse(sizeTextBox.Text) : (Size?)null;
+            var canResizeCheckBox = this.GetControl<CheckBox>("ShowWindowCanResize");
             var owner = (Window)this.GetVisualRoot()!;
 
             var window = new ShowWindowTest
             {
                 WindowStartupLocation = (WindowStartupLocation)locationComboBox.SelectedIndex,
+                CanResize = canResizeCheckBox.IsChecked.Value,
             };
 
             if (Application.Current?.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime lifetime)

tests/Avalonia.IntegrationTests.Appium/WindowTests_MacOS.cs

@@ -323,11 +323,30 @@ namespace Avalonia.IntegrationTests.Appium
             secondaryWindow.GetChromeButtons().close.Click();
         }
 
-        private IDisposable OpenWindow(PixelSize? size, ShowWindowMode mode, WindowStartupLocation location)
+        [PlatformTheory(TestPlatforms.MacOS)]
+        [InlineData(ShowWindowMode.NonOwned)]
+        [InlineData(ShowWindowMode.Owned)]
+        [InlineData(ShowWindowMode.Modal)]
+        public void Window_Has_Disabled_Zoom_Button_When_CanResize_Is_False(ShowWindowMode mode)
+        {
+            using (OpenWindow(null, mode, WindowStartupLocation.Manual, canResize: false))
+            {
+                var secondaryWindow = GetWindow("SecondaryWindow");
+                var (_, _, zoomButton) = secondaryWindow.GetChromeButtons();
+                Assert.False(zoomButton.Enabled);
+            }
+        }
+        
+        private IDisposable OpenWindow(
+            PixelSize? size,
+            ShowWindowMode mode,
+            WindowStartupLocation location,
+            bool canResize = true)
         {
             var sizeTextBox = _session.FindElementByAccessibilityId("ShowWindowSize");
             var modeComboBox = _session.FindElementByAccessibilityId("ShowWindowMode");
             var locationComboBox = _session.FindElementByAccessibilityId("ShowWindowLocation");
+            var canResizeCheckBox = _session.FindElementByAccessibilityId("ShowWindowCanResize");
             var showButton = _session.FindElementByAccessibilityId("ShowWindow");
 
             if (size.HasValue)
@@ -338,6 +357,9 @@ namespace Avalonia.IntegrationTests.Appium
 
             locationComboBox.Click();
             _session.FindElementByName(location.ToString()).SendClick();
+            
+            if (canResizeCheckBox.GetIsChecked() != canResize)
+                canResizeCheckBox.Click();
 
             return showButton.OpenWindowWithClick();
         }