diff --git a/Facepunch.Steamworks/Generated/SteamApi.cs b/Facepunch.Steamworks/Generated/SteamApi.cs
index 537409a..6c154d7 100644
--- a/Facepunch.Steamworks/Generated/SteamApi.cs
+++ b/Facepunch.Steamworks/Generated/SteamApi.cs
@@ -43,55 +43,200 @@ internal static class Win64
 			[return: MarshalAs( UnmanagedType.I1 )]
 			public static extern bool SteamAPI_RestartAppIfNecessary( uint unOwnAppID );
 			
+		}
+		internal static class MacOs
+		{
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_Init", CallingConvention = CallingConvention.Cdecl )]
+			[return: MarshalAs( UnmanagedType.I1 )]
+			public static extern bool SteamAPI_Init();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_RunCallbacks", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamAPI_RunCallbacks();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_RegisterCallback", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamAPI_RegisterCallback( IntPtr pCallback, int callback );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_UnregisterCallback", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamAPI_UnregisterCallback( IntPtr pCallback );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_RegisterCallResult", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamAPI_RegisterCallResult( IntPtr pCallback, SteamAPICall_t callback );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_UnregisterCallResult", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamAPI_UnregisterCallResult( IntPtr pCallback, SteamAPICall_t callback );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_Shutdown", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamAPI_Shutdown();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_GetHSteamUser", CallingConvention = CallingConvention.Cdecl )]
+			public static extern HSteamUser SteamAPI_GetHSteamUser();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_GetHSteamPipe", CallingConvention = CallingConvention.Cdecl )]
+			public static extern HSteamPipe SteamAPI_GetHSteamPipe();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamAPI_RestartAppIfNecessary", CallingConvention = CallingConvention.Cdecl )]
+			[return: MarshalAs( UnmanagedType.I1 )]
+			public static extern bool SteamAPI_RestartAppIfNecessary( uint unOwnAppID );
+			
 		}
 		static internal bool Init()
 		{
-			return Win64.SteamAPI_Init();
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamAPI_Init();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamAPI_Init();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void RunCallbacks()
 		{
-			Win64.SteamAPI_RunCallbacks();
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamAPI_RunCallbacks();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamAPI_RunCallbacks();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void RegisterCallback( IntPtr pCallback, int callback )
 		{
-			Win64.SteamAPI_RegisterCallback( pCallback, callback );
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamAPI_RegisterCallback( pCallback, callback );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamAPI_RegisterCallback( pCallback, callback );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void UnregisterCallback( IntPtr pCallback )
 		{
-			Win64.SteamAPI_UnregisterCallback( pCallback );
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamAPI_UnregisterCallback( pCallback );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamAPI_UnregisterCallback( pCallback );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void RegisterCallResult( IntPtr pCallback, SteamAPICall_t callback )
 		{
-			Win64.SteamAPI_RegisterCallResult( pCallback, callback );
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamAPI_RegisterCallResult( pCallback, callback );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamAPI_RegisterCallResult( pCallback, callback );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void UnregisterCallResult( IntPtr pCallback, SteamAPICall_t callback )
 		{
-			Win64.SteamAPI_UnregisterCallResult( pCallback, callback );
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamAPI_UnregisterCallResult( pCallback, callback );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamAPI_UnregisterCallResult( pCallback, callback );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void Shutdown()
 		{
-			Win64.SteamAPI_Shutdown();
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamAPI_Shutdown();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamAPI_Shutdown();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal HSteamUser GetHSteamUser()
 		{
-			return Win64.SteamAPI_GetHSteamUser();
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamAPI_GetHSteamUser();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamAPI_GetHSteamUser();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal HSteamPipe GetHSteamPipe()
 		{
-			return Win64.SteamAPI_GetHSteamPipe();
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamAPI_GetHSteamPipe();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamAPI_GetHSteamPipe();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal bool RestartAppIfNecessary( uint unOwnAppID )
 		{
-			return Win64.SteamAPI_RestartAppIfNecessary( unOwnAppID );
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamAPI_RestartAppIfNecessary( unOwnAppID );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamAPI_RestartAppIfNecessary( unOwnAppID );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 	}
diff --git a/Facepunch.Steamworks/Generated/SteamGameServer.cs b/Facepunch.Steamworks/Generated/SteamGameServer.cs
index 2e45cd8..12636c3 100644
--- a/Facepunch.Steamworks/Generated/SteamGameServer.cs
+++ b/Facepunch.Steamworks/Generated/SteamGameServer.cs
@@ -23,25 +23,84 @@ internal static class Win64
 			[DllImport( "steam_api64", EntryPoint = "SteamGameServer_GetHSteamPipe", CallingConvention = CallingConvention.Cdecl )]
 			public static extern HSteamPipe SteamGameServer_GetHSteamPipe();
 			
+		}
+		internal static class MacOs
+		{
+			[DllImport( "libsteam_api", EntryPoint = "SteamGameServer_RunCallbacks", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamGameServer_RunCallbacks();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamGameServer_Shutdown", CallingConvention = CallingConvention.Cdecl )]
+			public static extern void SteamGameServer_Shutdown();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamGameServer_GetHSteamUser", CallingConvention = CallingConvention.Cdecl )]
+			public static extern HSteamUser SteamGameServer_GetHSteamUser();
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamGameServer_GetHSteamPipe", CallingConvention = CallingConvention.Cdecl )]
+			public static extern HSteamPipe SteamGameServer_GetHSteamPipe();
+			
 		}
 		static internal void RunCallbacks()
 		{
-			Win64.SteamGameServer_RunCallbacks();
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamGameServer_RunCallbacks();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamGameServer_RunCallbacks();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal void Shutdown()
 		{
-			Win64.SteamGameServer_Shutdown();
+			if ( Config.Os == OsType.Windows )
+			{
+				Win64.SteamGameServer_Shutdown();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				MacOs.SteamGameServer_Shutdown();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal HSteamUser GetHSteamUser()
 		{
-			return Win64.SteamGameServer_GetHSteamUser();
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamGameServer_GetHSteamUser();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamGameServer_GetHSteamUser();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal HSteamPipe GetHSteamPipe()
 		{
-			return Win64.SteamGameServer_GetHSteamPipe();
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamGameServer_GetHSteamPipe();
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamGameServer_GetHSteamPipe();
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 	}
diff --git a/Facepunch.Steamworks/Generated/SteamInternal.cs b/Facepunch.Steamworks/Generated/SteamInternal.cs
index 459f692..8771135 100644
--- a/Facepunch.Steamworks/Generated/SteamInternal.cs
+++ b/Facepunch.Steamworks/Generated/SteamInternal.cs
@@ -24,25 +24,85 @@ internal static class Win64
 			[DllImport( "steam_api64", EntryPoint = "SteamInternal_CreateInterface", CallingConvention = CallingConvention.Cdecl )]
 			public static extern IntPtr SteamInternal_CreateInterface( string version );
 			
+		}
+		internal static class MacOs
+		{
+			[DllImport( "libsteam_api", EntryPoint = "SteamInternal_GameServer_Init", CallingConvention = CallingConvention.Cdecl )]
+			[return: MarshalAs( UnmanagedType.I1 )]
+			public static extern bool SteamInternal_GameServer_Init( uint unIP, ushort usPort, ushort usGamePort, ushort usQueryPort, int eServerMode, string pchVersionString );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamInternal_FindOrCreateUserInterface", CallingConvention = CallingConvention.Cdecl )]
+			public static extern IntPtr SteamInternal_FindOrCreateUserInterface( int steamuser, string versionname );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamInternal_FindOrCreateGameServerInterface", CallingConvention = CallingConvention.Cdecl )]
+			public static extern IntPtr SteamInternal_FindOrCreateGameServerInterface( int steamuser, string versionname );
+			
+			[DllImport( "libsteam_api", EntryPoint = "SteamInternal_CreateInterface", CallingConvention = CallingConvention.Cdecl )]
+			public static extern IntPtr SteamInternal_CreateInterface( string version );
+			
 		}
 		static internal bool GameServer_Init( uint unIP, ushort usPort, ushort usGamePort, ushort usQueryPort, int eServerMode, string pchVersionString )
 		{
-			return Win64.SteamInternal_GameServer_Init( unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString );
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamInternal_GameServer_Init( unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamInternal_GameServer_Init( unIP, usPort, usGamePort, usQueryPort, eServerMode, pchVersionString );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal IntPtr FindOrCreateUserInterface( int steamuser, string versionname )
 		{
-			return Win64.SteamInternal_FindOrCreateUserInterface( steamuser, versionname );
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamInternal_FindOrCreateUserInterface( steamuser, versionname );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamInternal_FindOrCreateUserInterface( steamuser, versionname );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal IntPtr FindOrCreateGameServerInterface( int steamuser, string versionname )
 		{
-			return Win64.SteamInternal_FindOrCreateGameServerInterface( steamuser, versionname );
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamInternal_FindOrCreateGameServerInterface( steamuser, versionname );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamInternal_FindOrCreateGameServerInterface( steamuser, versionname );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 		static internal IntPtr CreateInterface( string version )
 		{
-			return Win64.SteamInternal_CreateInterface( version );
+			if ( Config.Os == OsType.Windows )
+			{
+				return Win64.SteamInternal_CreateInterface( version );
+			}
+			else if ( Config.Os == OsType.MacOs )
+			{
+				return MacOs.SteamInternal_CreateInterface( version );
+			}
+			else
+			{
+				throw new System.Exception( "this platform isn't supported" );
+			}
 		}
 		
 	}
diff --git a/Generator/CodeWriter/GlobalFunctions.cs b/Generator/CodeWriter/GlobalFunctions.cs
index bd13cd1..d25f418 100644
--- a/Generator/CodeWriter/GlobalFunctions.cs
+++ b/Generator/CodeWriter/GlobalFunctions.cs
@@ -36,6 +36,15 @@ public void GenerateGlobalFunctions( string startingWith, string filename )
 					}
 					EndBlock();
 
+					StartBlock( $"internal static class MacOs" );
+					{
+						foreach ( var func in functions )
+						{
+							WriteMarshalledFunction( func, "libsteam_api" );
+						}
+					}
+					EndBlock();
+
 					foreach ( var func in functions )
 					{
 						WriteGlobalFunction( startingWith, func );
@@ -78,22 +87,50 @@ private void WriteGlobalFunction( string cname, SteamApiDefinition.MethodDef fun
 			{
 				var callargs = string.Join( ", ", args.Select( x => x.AsCallArgument() ) );
 
-				if ( returnType.IsReturnedWeird )
+				StartBlock( "if ( Config.Os == OsType.Windows )" );
 				{
-					WriteLine( $"var retVal = default( {returnType.TypeName} );" );
-					WriteLine( $"Win64.{func.Name}( ref retVal, {callargs} );" );
-					WriteLine( $"{returnType.Return( "retVal" )}" );
-				}
-				else if ( returnType.IsVoid )
-				{
-					WriteLine( $"Win64.{func.Name}( {callargs} );" );
-				}
-				else
-				{
-					var v = $"Win64.{func.Name}( {callargs} )";
 
-					WriteLine( returnType.Return( v ) );
+					if ( returnType.IsReturnedWeird )
+					{
+						WriteLine( $"var retVal = default( {returnType.TypeName} );" );
+						WriteLine( $"Win64.{func.Name}( ref retVal, {callargs} );" );
+						WriteLine( $"{returnType.Return( "retVal" )}" );
+					}
+					else if ( returnType.IsVoid )
+					{
+						WriteLine( $"Win64.{func.Name}( {callargs} );" );
+					}
+					else
+					{
+						var v = $"Win64.{func.Name}( {callargs} )";
+
+						WriteLine( returnType.Return( v ) );
+					}
 				}
+				Else( " if ( Config.Os == OsType.MacOs )" );
+				{
+					if ( returnType.IsReturnedWeird )
+					{
+						WriteLine( $"var retVal = default( {returnType.TypeName} );" );
+						WriteLine( $"MacOs.{func.Name}( ref retVal, {callargs} );" );
+						WriteLine( $"{returnType.Return( "retVal" )}" );
+					}
+					else if ( returnType.IsVoid )
+					{
+						WriteLine( $"MacOs.{func.Name}( {callargs} );" );
+					}
+					else
+					{
+						var v = $"MacOs.{func.Name}( {callargs} )";
+
+						WriteLine( returnType.Return( v ) );
+					}
+				}
+				Else();
+				{
+					WriteLine( "throw new System.Exception( \"this platform isn't supported\" );" );
+				}
+				EndBlock();
 			}
 			EndBlock();