---
title: anchor
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/spatialtrackingsession/unavailablecapabilities/anchor
---

# anchor

A type that contains all unavailable anchor capabilities.

## Declaration

```swift
var anchor: Set<SpatialTrackingSession.Configuration.AnchorCapability> { get }
```

## Discussion

Discussion The system marks certain anchor capabilities as unavailable if: The device running your app doesn’t support them. The person using the device doesn’t approve the corresponding ARKit authorization.