diff --git a/dom/media/platforms/apple/AppleVTDecoder.cpp b/dom/media/platforms/apple/AppleVTDecoder.cpp
index f3d8b9201d5e..005fef3d5c82 100644
--- a/dom/media/platforms/apple/AppleVTDecoder.cpp
+++ b/dom/media/platforms/apple/AppleVTDecoder.cpp
@@ -45,7 +45,6 @@ AppleVTDecoder::AppleVTDecoder(const VideoInfo& aConfig,
                       ? *aConfig.mColorSpace
                       : DefaultColorSpace({mPictureWidth, mPictureHeight})),
       mColorRange(aConfig.mColorRange),
-      mColorDepth(aConfig.mColorDepth),
       mStreamType(MP4Decoder::IsH264(aConfig.mMimeType)  ? StreamType::H264
                   : VPXDecoder::IsVP9(aConfig.mMimeType) ? StreamType::VP9
                                                          : StreamType::Unknown),
@@ -608,13 +607,10 @@ CFDictionaryRef AppleVTDecoder::CreateOutputConfiguration() {
 
 #ifndef MOZ_WIDGET_UIKIT
   // Output format type:
-  bool is10Bit = (gfx::BitDepthForColorDepth(mColorDepth) == 10);
   SInt32 PixelFormatTypeValue =
       mColorRange == gfx::ColorRange::FULL
-          ? (is10Bit ? kCVPixelFormatType_420YpCbCr10BiPlanarFullRange
-                     : kCVPixelFormatType_420YpCbCr8BiPlanarFullRange)
-          : (is10Bit ? kCVPixelFormatType_420YpCbCr10BiPlanarVideoRange
-                     : kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange);
+          ? kCVPixelFormatType_420YpCbCr8BiPlanarFullRange
+          : kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange;
   AutoCFRelease<CFNumberRef> PixelFormatTypeNumber = CFNumberCreate(
       kCFAllocatorDefault, kCFNumberSInt32Type, &PixelFormatTypeValue);
   // Construct IOSurface Properties
diff --git a/dom/media/platforms/apple/AppleVTDecoder.h b/dom/media/platforms/apple/AppleVTDecoder.h
index 84d99badcbdd..afb2c76ce9f6 100644
--- a/dom/media/platforms/apple/AppleVTDecoder.h
+++ b/dom/media/platforms/apple/AppleVTDecoder.h
@@ -92,7 +92,6 @@ class AppleVTDecoder : public MediaDataDecoder,
   const uint32_t mDisplayHeight;
   const gfx::YUVColorSpace mColorSpace;
   const gfx::ColorRange mColorRange;
-  const gfx::ColorDepth mColorDepth;
 
   // Method to set up the decompression session.
   MediaResult InitializeSession();