Transparent Standard Surface (MaterialX) Issue on Intel-Based Mac

When I try to render a mesh assigned with a transparent material of Standard Surface (MaterialX), on an Intel-based Mac using Storm, it does not show up (at least in usdview). I wonder what would be the cause.

Here is the specification of the hardware:
MacBook Pro (2016)
Processor: 2.9 GHz Quad-Core Intel Core i7

  • Radeon Pro 460 4GB
  • Intel HD Graphics 530 1536 MB

Would you be able to attach a file here, or better yet, open an issue on the GitHub with the file attached?

Also are you seeing any messages or errors in the terminal after you open the file with usdview?

Ok, I have opened an issue on the GitHub.

There is no message/error in the terminal upon opening the file with usdview.