--- a/dom/media/fmp4/ffmpeg/FFmpegRuntimeLinker.cpp
+++ b/dom/media/fmp4/ffmpeg/FFmpegRuntimeLinker.cpp
@@ -31,16 +31,20 @@ public:
   static PlatformDecoderModule* Create();
 };
 
 static const AvFormatLib sLibs[] = {
   { "libavformat.so.56", FFmpegDecoderModule<55>::Create, 55 },
   { "libavformat.so.55", FFmpegDecoderModule<55>::Create, 55 },
   { "libavformat.so.54", FFmpegDecoderModule<54>::Create, 54 },
   { "libavformat.so.53", FFmpegDecoderModule<53>::Create, 53 },
+  { "libavformat.56.dylib", FFmpegDecoderModule<55>::Create, 55 },
+  { "libavformat.55.dylib", FFmpegDecoderModule<55>::Create, 55 },
+  { "libavformat.54.dylib", FFmpegDecoderModule<54>::Create, 54 },
+  { "libavformat.53.dylib", FFmpegDecoderModule<53>::Create, 53 },
 };
 
 void* FFmpegRuntimeLinker::sLinkedLib = nullptr;
 const AvFormatLib* FFmpegRuntimeLinker::sLib = nullptr;
 
 #define AV_FUNC(func, ver) void (*func)();
 #define LIBAVCODEC_ALLVERSION
 #include "FFmpegFunctionList.h"