diff --git a/src/backend/metal/CommandBufferMTL.mm b/src/backend/metal/CommandBufferMTL.mm
index 2a0ab0412f..80ac7d5a20 100644
--- a/src/backend/metal/CommandBufferMTL.mm
+++ b/src/backend/metal/CommandBufferMTL.mm
@@ -97,7 +97,8 @@ namespace metal {
                         usingBackbuffer = true;
                     }
                     descriptor.colorAttachments[index].texture = texture;
-                    descriptor.colorAttachments[index].loadAction = MTLLoadActionLoad;
+                    descriptor.colorAttachments[index].loadAction = MTLLoadActionClear;
+                    descriptor.colorAttachments[index].clearColor = MTLClearColorMake(0.0, 0.0, 0.0, 0.0);
                     descriptor.colorAttachments[index].storeAction = MTLStoreActionStore;
                 }
                 // TODO(kainino@chromium.org): load depth attachment from subpass
diff --git a/src/backend/metal/PipelineMTL.mm b/src/backend/metal/PipelineMTL.mm
index 3732c9d928..8b92aee6e6 100644
--- a/src/backend/metal/PipelineMTL.mm
+++ b/src/backend/metal/PipelineMTL.mm
@@ -68,7 +68,8 @@ namespace metal {
                 }
             }
 
-            descriptor.colorAttachments[0].pixelFormat = MTLPixelFormatBGRA8Unorm;
+            // TODO(cwallez@chromium.org): get the attachment formats from the subpass
+            descriptor.colorAttachments[0].pixelFormat = MTLPixelFormatRGBA8Unorm;
             descriptor.depthAttachmentPixelFormat = MTLPixelFormatDepth32Float;
 
             InputState* inputState = ToBackend(GetInputState());