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# shutdown

System pressure is beyond critical, so the capture system has shut down.

```
static let shutdown: AVCaptureDevice.SystemPressureState.Level
```

## Discussion

When system pressure reaches this level, the capture system automatically shuts down, causing a session interruption. Use the [`AVCaptureSessionInterruptionSystemPressureStateKey`](/documentation/AVFoundation/AVCaptureSessionInterruptionSystemPressureStateKey) in the interruption notification’s <doc://com.apple.documentation/documentation/Foundation/Notification/userInfo> dictionary to find details about the system pressure factors causing the interruption.

---

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