---
title: NSEvent.EventType.systemDefined
framework: appkit
role: symbol
role_heading: Case
path: appkit/nsevent/eventtype/systemdefined
---

# NSEvent.EventType.systemDefined

A system-related event occurred.

## Declaration

```swift
case systemDefined
```

## See Also

### Getting System Event Types

- [NSEvent.EventType.appKitDefined](appkit/nsevent/eventtype/appkitdefined.md)
- [NSEvent.EventType.applicationDefined](appkit/nsevent/eventtype/applicationdefined.md)
- [NSEvent.EventType.cursorUpdate](appkit/nsevent/eventtype/cursorupdate.md)
- [NSEvent.EventType.flagsChanged](appkit/nsevent/eventtype/flagschanged.md)
- [NSEvent.EventType.periodic](appkit/nsevent/eventtype/periodic.md)
- [NSEvent.EventType.quickLook](appkit/nsevent/eventtype/quicklook.md)