---
title: isRunningOutput
framework: Core Audio
role: symbol
role_heading: Instance Property
platforms: [macOS 15.0+]
path: coreaudio/audiohardwareprocess/isrunningoutput
---

# isRunningOutput

A Bool where a value of true indicates that the process is running IO and there is at least one active output stream.

## Declaration

```swift
var isRunningOutput: Bool { get throws }
```