diff --git a/Legacy/ProjectSettings/ProjectVersion.txt b/Legacy/ProjectSettings/ProjectVersion.txt
index 91206fd..da67189 100644
--- a/Legacy/ProjectSettings/ProjectVersion.txt
+++ b/Legacy/ProjectSettings/ProjectVersion.txt
@@ -1,2 +1,2 @@
-m_EditorVersion: 2022.3.13f1
-m_EditorVersionWithRevision: 2022.3.13f1 (5f90a5ebde0f)
+m_EditorVersion: 2022.3.14f1
+m_EditorVersionWithRevision: 2022.3.14f1 (eff2de9070d8)
diff --git a/jp.keijiro.klak.syphon/Runtime/Interop/PluginClient.cs b/jp.keijiro.klak.syphon/Runtime/Interop/PluginClient.cs
index 5aaea29..28ae10b 100644
--- a/jp.keijiro.klak.syphon/Runtime/Interop/PluginClient.cs
+++ b/jp.keijiro.klak.syphon/Runtime/Interop/PluginClient.cs
@@ -63,6 +63,8 @@ public Texture2D CreateTexture()
 
     #region Unmanaged interface
 
+    #if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
+
     [DllImport("KlakSyphon", EntryPoint = "Plugin_CreateClient")]
     static extern PluginClient _Create(string name, string appName);
 
@@ -84,6 +86,18 @@ public Texture2D CreateTexture()
     [DllImport("KlakSyphon", EntryPoint = "Plugin_UpdateClient")]
     static extern void _Update(PluginClient instance);
 
+    #else
+
+    static PluginClient _Create(string name, string appName) => null;
+    static void _Destroy(IntPtr instance) {}
+    static bool _IsValid(PluginClient instance) => false;
+    static IntPtr _GetTexture(PluginClient instance) => IntPtr.Zero;
+    static int _GetTextureWidth(PluginClient instance) => 0;
+    static int _GetTextureHeight(PluginClient instance) => 0;
+    static void _Update(PluginClient instance) {}
+
+    #endif
+
     #endregion
 }
 
diff --git a/jp.keijiro.klak.syphon/Runtime/Interop/PluginCommon.cs b/jp.keijiro.klak.syphon/Runtime/Interop/PluginCommon.cs
index ed66314..e737fdd 100644
--- a/jp.keijiro.klak.syphon/Runtime/Interop/PluginCommon.cs
+++ b/jp.keijiro.klak.syphon/Runtime/Interop/PluginCommon.cs
@@ -4,11 +4,20 @@ namespace Klak.Syphon.Interop {
 
 public static class PluginCommon
 {
+    #if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
+
     [DllImport("KlakSyphon", EntryPoint = "Plugin_EnableColorSpaceConversion")]
     public static extern void EnableColorSpaceConversion();
 
     [DllImport("KlakSyphon", EntryPoint = "Plugin_DisableColorSpaceConversion")]
     public static extern void DisableColorSpaceConversion();
+
+    #else
+
+    public static void EnableColorSpaceConversion() {}
+    public static void DisableColorSpaceConversion() {}
+
+    #endif
 }
 
 } // namespace Klak.Sypho.Interopn
diff --git a/jp.keijiro.klak.syphon/Runtime/Interop/PluginServer.cs b/jp.keijiro.klak.syphon/Runtime/Interop/PluginServer.cs
index 3e94f95..a8294b7 100644
--- a/jp.keijiro.klak.syphon/Runtime/Interop/PluginServer.cs
+++ b/jp.keijiro.klak.syphon/Runtime/Interop/PluginServer.cs
@@ -39,6 +39,7 @@ public static (PluginServer, Texture2D)
       CreateWithBackedTexture(string name, int width, int height)
     {
         var instance = Create(name, width, height);
+        if (instance == null) return (null, null);
         var texture = Texture2D.CreateExternalTexture
            (width, height, TextureFormat.RGBA32,
             false, false, instance.TexturePointer);
@@ -49,6 +50,8 @@ public static (PluginServer, Texture2D)
 
     #region Unmanaged interface
 
+    #if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
+
     [DllImport("KlakSyphon", EntryPoint = "Plugin_CreateServer")]
     static extern PluginServer _Create(string name, int width, int height);
 
@@ -61,6 +64,15 @@ public static (PluginServer, Texture2D)
     [DllImport("KlakSyphon", EntryPoint = "Plugin_PublishServerTexture")]
     static extern void _PublishTexture(PluginServer instance);
 
+    #else
+
+    static PluginServer _Create(string name, int width, int height) => null;
+    static void _Destroy(IntPtr instance) {}
+    static IntPtr _GetTexture(PluginServer instance) => IntPtr.Zero;
+    static void _PublishTexture(PluginServer instance) {}
+
+    #endif
+
     #endregion
 }
 
diff --git a/jp.keijiro.klak.syphon/Runtime/Interop/ServerList.cs b/jp.keijiro.klak.syphon/Runtime/Interop/ServerList.cs
index 157aa41..762d84f 100644
--- a/jp.keijiro.klak.syphon/Runtime/Interop/ServerList.cs
+++ b/jp.keijiro.klak.syphon/Runtime/Interop/ServerList.cs
@@ -37,6 +37,8 @@ protected override bool ReleaseHandle()
     string ToString(IntPtr ptr)
       => ptr != IntPtr.Zero ? Marshal.PtrToStringAnsi(ptr) : null;
 
+    #if UNITY_STANDALONE_OSX || UNITY_EDITOR_OSX
+
     [DllImport("KlakSyphon", EntryPoint = "Plugin_CreateServerList")]
     static extern ServerList _Create();
 
@@ -52,6 +54,16 @@ string ToString(IntPtr ptr)
     [DllImport("KlakSyphon", EntryPoint = "Plugin_GetAppNameFromServerList")]
     static extern IntPtr _GetAppName(ServerList list, int index);
 
+    #else
+
+    static ServerList _Create() => null;
+    static void _Destroy(IntPtr list) {}
+    static int _GetCount(ServerList list) => 0;
+    static IntPtr _GetName(ServerList list, int index) => IntPtr.Zero;
+    static IntPtr _GetAppName(ServerList list, int index) => IntPtr.Zero;
+
+    #endif
+
     #endregion
 }
 
diff --git a/jp.keijiro.klak.syphon/Runtime/SyphonServerDirectory.cs b/jp.keijiro.klak.syphon/Runtime/SyphonServerDirectory.cs
index dba15fe..42e89b6 100644
--- a/jp.keijiro.klak.syphon/Runtime/SyphonServerDirectory.cs
+++ b/jp.keijiro.klak.syphon/Runtime/SyphonServerDirectory.cs
@@ -10,7 +10,7 @@ public static IEnumerable<string> EnumerateServerNames()
     {
         using var plugin = Interop.ServerList.Create();
         var list = new List<string>();
-        for (var i = 0; i < plugin.Count; i++)
+        for (var i = 0; i < (plugin?.Count ?? 0); i++)
         {
             var (app, name) = (plugin.GetAppName(i), plugin.GetName(i));
             list.Add(string.IsNullOrEmpty(name) ? app : $"{app}/{name}");