Allow LightBaker to accept incoming network connections on MacOS + CPULM

Steps to reproduce

1. Get a fresh Editor build (bug only reproduces once per Editor install)
2. Open any project on a MacOS device
3. Switch to the CPU Lightmapper
4. Bake
5. At some point during the bake you will get this popup:

Do you want the application "LightBaker" to accept incoming network connections?

Notes

• This does not reproduce with the GPU Lightmapper
• This has not been noticed on Windows (though not explicitly tested)
• Clicking Deny or Allow on the prompt does not change the outcome of the bake (as far as I could tell).