---
title: Start
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 13.0+, macOS 10.0+]
path: iokit/iocfplugininterfacestruct/1412433-start
---

# Start

## Declaration

```swift
var Start: ((UnsafeMutableRawPointer?, CFDictionary?, io_service_t) -> IOReturn)!
```