diff --git a/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.Windows.NetStandard.cs b/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.Windows.crossruntime.cs
similarity index 99%
rename from src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.Windows.NetStandard.cs
rename to src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.Windows.crossruntime.cs
index 05398d871..4451cd95c 100644
--- a/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.Windows.NetStandard.cs
+++ b/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.Windows.crossruntime.cs
@@ -1,4 +1,4 @@
-#if WINDOWS || WINDOWS_UWP || NET472_OR_GREATER || NETSTANDARD2_0
+#if WINDOWS || WINDOWS_UWP || __SKIA_OR_WASM__
 using System;
 using System.Linq;
 using System.Threading;
diff --git a/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.cs b/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.cs
index 40f16c3e0..f2c774a64 100644
--- a/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.cs
+++ b/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.cs
@@ -95,15 +95,4 @@ private async Task LoadNativeSplashScreen()
 			SplashScreenContent = splashScreenContent;
 		}
 	}
-
-
-#if !__ANDROID__ && !__IOS__ && !(WINDOWS || WINDOWS_UWP) && !NETSTANDARD2_0
-	private static Task<FrameworkElement?> GetNativeSplashScreen()
-	{
-		return Task.FromResult<FrameworkElement?>(null);
-	}
-
-	public bool SplashIsEnabled => (Platforms & SplashScreenPlatform.All) != 0;
-#endif
-
 }
diff --git a/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.macOS.cs b/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.macOS.cs
new file mode 100644
index 000000000..27386de2c
--- /dev/null
+++ b/src/Uno.Toolkit.UI/Controls/ExtendedSplashScreen/ExtendedSplashScreen.macOS.cs
@@ -0,0 +1,21 @@
+#if !__ANDROID__ && !__IOS__ && !(WINDOWS || WINDOWS_UWP) && !__SKIA_OR_WASM__
+
+#if IS_WINUI
+using Microsoft.UI.Xaml;
+#else
+using Windows.UI.Xaml;
+#endif
+using System.Threading.Tasks;
+
+namespace Uno.Toolkit.UI;
+
+public partial class ExtendedSplashScreen
+{
+	private static Task<FrameworkElement?> GetNativeSplashScreen()
+	{
+		return Task.FromResult<FrameworkElement?>(null);
+	}
+
+	public bool SplashIsEnabled => (Platforms & SplashScreenPlatform.All) != 0;
+}
+#endif
diff --git a/src/Uno.Toolkit.UI/Uno.Toolkit.UI.csproj b/src/Uno.Toolkit.UI/Uno.Toolkit.UI.csproj
index 397bf600b..463d0ebb3 100644
--- a/src/Uno.Toolkit.UI/Uno.Toolkit.UI.csproj
+++ b/src/Uno.Toolkit.UI/Uno.Toolkit.UI.csproj
@@ -18,6 +18,11 @@
 		<UnoXamlResourcesTrimming Condition="'$(OS)'=='Windows_NT' or '$(MSBuildRuntimeType)'=='Core'">true</UnoXamlResourcesTrimming>
 	</PropertyGroup>
 
+	<!-- Undo this as part of https://github.com/unoplatform/uno.toolkit.ui/issues/1078 once we update to Uno 5.1+ -->
+	<PropertyGroup>
+		<DefineConstants Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == ''">$(DefineConstants);__SKIA_OR_WASM__</DefineConstants>
+	</PropertyGroup>
+
 	<ItemGroup>
 		<ProjectReference Include="..\Uno.Toolkit\Uno.Toolkit.csproj" />
 	</ItemGroup>
diff --git a/src/Uno.Toolkit.UI/Uno.Toolkit.WinUI.csproj b/src/Uno.Toolkit.UI/Uno.Toolkit.WinUI.csproj
index 92c6b5457..e8b81cc03 100644
--- a/src/Uno.Toolkit.UI/Uno.Toolkit.WinUI.csproj
+++ b/src/Uno.Toolkit.UI/Uno.Toolkit.WinUI.csproj
@@ -18,6 +18,11 @@
 		<UnoXamlResourcesTrimming Condition="'$(OS)'=='Windows_NT' or '$(MSBuildRuntimeType)'=='Core'">true</UnoXamlResourcesTrimming>
 	</PropertyGroup>
 
+	<!-- Undo this as part of https://github.com/unoplatform/uno.toolkit.ui/issues/1078 once we update to Uno 5.1+ -->
+	<PropertyGroup>
+		<DefineConstants Condition="$([MSBuild]::GetTargetPlatformIdentifier('$(TargetFramework)')) == ''">$(DefineConstants);__SKIA_OR_WASM__</DefineConstants>
+	</PropertyGroup>
+
 	<ItemGroup>
 		<ProjectReference Include="..\Uno.Toolkit\Uno.Toolkit.csproj" />
 	</ItemGroup>