support for sandbox on macOS

Is there any progress on a sandboxed browser for macOS? The Q and A with Yawning Angel last year said that the Tor browser team is looking at OSX.

https://blog.torproject.org/blog/q-and-yawning-angel Which operating system will the sandbox support?

We need a sandbox for Linux, OSX, and Windows. I’m working on the Linux one. The Tor browser team is looking at OSX.

Trac:
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