Update EncoderValidator.cs

MediaBrowser.MediaEncoding/Encoder/EncoderValidator.cs

@@ -46,6 +46,12 @@ namespace MediaBrowser.MediaEncoding.Encoder
             "mpeg4_mediacodec",
             "vp8_mediacodec",
             "vp9_mediacodec"
+            "h264_videotoolbox",
+            "hevc_videotoolbox",
+            "mpeg2_videotoolbox",
+            "mpeg4_videotoolbox",
+            "vp8_videotoolbox",
+            "vp9_videotoolbox"
         };
 
         private static readonly string[] requiredEncoders = new[]
@@ -74,6 +80,8 @@ namespace MediaBrowser.MediaEncoding.Encoder
             "h264_omx",
             "hevc_omx",
             "h264_v4l2m2m"
+            "h264_videotoolbox"
+            "hevc_videotoolbox"
         };
 
         // Try and use the individual library versions to determine a FFmpeg version