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# RunLoop.Mode

Modes that a run loop operates in.

```
struct Mode
```

## Discussion

<doc://com.apple.documentation/documentation/AppKit/NSApplication> defines additional run loop modes, including the following:

- [`modalPanel`](/documentation/Foundation/RunLoop/Mode/modalPanel)
- [`eventTracking`](/documentation/Foundation/RunLoop/Mode/eventTracking)

## Topics

### System Run Loop Modes

[`common`](/documentation/Foundation/RunLoop/Mode/common)

A pseudo-mode that includes one or more other run loop modes.

[`default`](/documentation/Foundation/RunLoop/Mode/default)

The mode set to handle input sources other than connection objects.

[`eventTracking`](/documentation/Foundation/RunLoop/Mode/eventTracking)

The mode set when tracking events modally, such as a mouse-dragging loop.

[`modalPanel`](/documentation/Foundation/RunLoop/Mode/modalPanel)

The mode set when waiting for input from a modal panel, such as a save or open panel.

[`tracking`](/documentation/Foundation/RunLoop/Mode/tracking)

The mode set while tracking in controls takes place.

### Run Loop Mode Creation

[`init(_:)`](/documentation/Foundation/RunLoop/Mode/init(_:))

Creates a run loop mode using the specified string value.

[`init(rawValue:)`](/documentation/Foundation/RunLoop/Mode/init(rawValue:))

Creates a run loop mode using the specified raw string value.


---

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