---
title: IOUSBHostAbortOption.synchronous
framework: iousbhost
role: symbol
role_heading: Case
path: iousbhost/iousbhostabortoption/synchronous
---

# IOUSBHostAbortOption.synchronous

The option to abort input/output requests synchronously.

## Declaration

```swift
case synchronous
```

## Discussion

Discussion This is the default argument for functions that abort pending input/output requests. All input/output requests must abort before functions can return.

## See Also

### Options

- [IOUSBHostAbortOption.asynchronous](iousbhost/iousbhostabortoption/asynchronous.md)