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# AVAudioUnitComponent.TagsDidChangeMessage

Type-safe notification message for audio unit component tag changes.

```
struct TagsDidChangeMessage
```

## Overview

This notification is posted when the user tags of an audio unit component are modified.
The notification object is the `AVAudioUnitComponent` whose tags changed.

> Note: User tags are only supported on macOS.

## Relationships

### Conforms To

[`AsyncMessage`](/documentation/Foundation/NotificationCenter/AsyncMessage)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Sendable`](/documentation/Swift/Sendable)

---

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