To reproduce:

1. Download attached “Webcam.zip" project and open in Unity
2. Open "Webcam" scene
3. Build and Run for Standalone
4. If an OS window pops out asking for permission, choose "No" and re-launch Editor/Player
5. If crash doesn't happen. Go to Mac System Preference -> Security & Privacy -> Privacy -> Camera -> find the Editor/Player in the list and uncheck it

Expected results: Player starts without any issue
Actual results: Player crashes on Opening

Notes:
- This is caused by Mojave security update.
- Mic also needs permission, but it does NOT crash. Only camera causes crash.
- On Unity 2019.3.0a2 project becomes corrupted

Reproduced on Unity from 2017.4