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# es_event_iokit_open_t

A type for an event that indicates the opening of an IOKit device.

```
struct es_event_iokit_open_t
```

## Overview

Endpoint Security generates this event when a process calls <doc://com.apple.documentation/documentation/iokit/1514515-ioserviceopen> in order to open a communications channel with an IOKit driver. The event doesn’t correspond to driver/device communication and provides neither visibility nor access control into devices.

## Topics

### Inspecting Event Properties

[`user_client_class`](/documentation/EndpointSecurity/es_event_iokit_open_t/user_client_class)

The name of the IOKit service client.

[`user_client_type`](/documentation/EndpointSecurity/es_event_iokit_open_t/user_client_type)

The type of the IOKit client.

[`reserved`](/documentation/EndpointSecurity/es_event_iokit_open_t/reserved)

An unused field reserved for future use.


---

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