---
title: USB Release constants
framework: IOKit
role: containerSymbol
role_heading: Enumeration
platforms: [Mac Catalyst 18.4+, macOS 10.0+]
path: iokit/1424886-usb_release_constants
---

# USB Release constants

## Declaration

```occ
enum : unsigned int {
    ...
};
```

## Topics

### Constants

- [kUSBRel10](1424886-usb_release_constants/kusbrel10.md)
- [kUSBRel11](1424886-usb_release_constants/kusbrel11.md)
- [kUSBRel20](1424886-usb_release_constants/kusbrel20.md)
- [kUSBRel30](1424886-usb_release_constants/kusbrel30.md)