---
title: systemDefined
framework: appkit
role: symbol
role_heading: Type Property
path: appkit/nsevent/eventtypemask/systemdefined
---

# systemDefined

A mask for system-defined events.

## Declaration

```swift
static var systemDefined: NSEvent.EventTypeMask { get }
```

## See Also

### Getting System Events

- [appKitDefined](appkit/nsevent/eventtypemask/appkitdefined.md)
- [applicationDefined](appkit/nsevent/eventtypemask/applicationdefined.md)
- [cursorUpdate](appkit/nsevent/eventtypemask/cursorupdate.md)
- [flagsChanged](appkit/nsevent/eventtypemask/flagschanged.md)
- [periodic](appkit/nsevent/eventtypemask/periodic.md)