diff --git a/.github/workflows/x-win.yml b/.github/workflows/x-win.yml
index 747ba031..106756d1 100644
--- a/.github/workflows/x-win.yml
+++ b/.github/workflows/x-win.yml
@@ -89,7 +89,21 @@ jobs:
 
     # build RoyalVNCKit
 
+    - name: build RoyalVNCKit (Apple)
+      if: "success() && matrix.env.OS == 'apple'"
+      run: |
+        swift package clean --configuration release
+        swift build --configuration release --arch arm64
+        swift build --configuration release --arch x86_64
+
+        mkdir -p ./build/universal-apple-macosx/release
+        lipo -create \
+          .build/arm64-apple-macosx/release/libRoyalVNCKit.dylib \
+          .build/x86_64-apple-macosx/release/libRoyalVNCKit.dylib \
+          -output .build/universal-apple-macosx/release/libRoyalVNCKit.dylib
+
     - name: build RoyalVNCKit
+      if: "success() && matrix.env.OS != 'apple'"
       run: |
         swift package clean --configuration release
         swift build --configuration release
diff --git a/Bindings/dotnet/RoyalApps.RoyalVNCKit.Demo/RoyalApps.RoyalVNCKit.Demo.csproj b/Bindings/dotnet/RoyalApps.RoyalVNCKit.Demo/RoyalApps.RoyalVNCKit.Demo.csproj
index 7be6bdbd..cf9d0a7f 100644
--- a/Bindings/dotnet/RoyalApps.RoyalVNCKit.Demo/RoyalApps.RoyalVNCKit.Demo.csproj
+++ b/Bindings/dotnet/RoyalApps.RoyalVNCKit.Demo/RoyalApps.RoyalVNCKit.Demo.csproj
@@ -26,9 +26,7 @@
     <_NativeLibrary>$(_SwiftBuildDir)$(_NativeArch)-unknown-linux-gnu\$(_NativeCfg)\libRoyalVNCKit.so</_NativeLibrary>
   </PropertyGroup>
   <PropertyGroup Label="macOS" Condition="$([MSBuild]::IsOSPlatform('OSX'))">
-    <_SwiftArch Condition="'$(_NativeArch)' == 'aarch64'">arm64</_SwiftArch>
-    <_SwiftArch Condition="'$(_SwiftArch)' == ''">$(_NativeArch)</_SwiftArch>
-    <_NativeLibrary>$(_SwiftBuildDir)$(_SwiftArch)-apple-macosx\$(_NativeCfg)\libRoyalVNCKit.dylib</_NativeLibrary>
+    <_NativeLibrary>$(_SwiftBuildDir)universal-apple-macosx\$(_NativeCfg)\libRoyalVNCKit.dylib</_NativeLibrary>
   </PropertyGroup>
   <PropertyGroup Label="Windows" Condition="$([MSBuild]::IsOSPlatform('Windows'))">
     <_NativeLibrary>$(_SwiftBuildDir)$(_NativeArch)-unknown-windows-msvc\$(_NativeCfg)\RoyalVNCKit.dll</_NativeLibrary>