fix mac build

Scripts/RuntimeLoader.meta

@@ -1,9 +0,0 @@
-fileFormatVersion: 2
-guid: a0029457c7d957543a48dc39a63380a4
-folderAsset: yes
-timeCreated: 1522734361
-licenseType: Free
-DefaultImporter:
-  userData: 
-  assetBundleName: 
-  assetBundleVariant: 

_RuntimeLoaderSample/VRMRuntimeLoader.cs

@@ -234,11 +234,15 @@ namespace VRM
 
         void LoadBVHClicked()
         {
+#if UNITY_STANDALONE_WIN
             var path = FileDialog("open BVH", ".bvh");
             if (!string.IsNullOrEmpty(path))
             {
                 LoadBvh(path);
             }
+#else
+            LoadBvh(Application.dataPath + "/default.bvh");
+#endif
         }
 
         void OnLoaded(GameObject root)