The `mater` branch is compatible with Unity 2019.1 and later. For 2018.4, see the [1.5-preview branch](https://github.com/Unity-Technologies/arfoundation-samples/tree/1.5-preview). ARFoundation 1.5 is functionality equivalent to 2.2. The only difference is the version of Unity on which it depends.
## :warning: ARKit 3 Support
The `master` branch includes support for ARKit 3, which is still in beta. While ARFoundation and ARSubsystems 2.2 _support_ ARKit 3, only Unity's ARKit XR Plugin 2.2 package contains _support_ for these features and _requires_ Xcode 11 beta and iOS 13 beta. Unity's ARKit XR Plugin 2.2 is not backwards compatible with previous versions of Xcode or iOS.
The `master` branch includes support for ARKit 3, which is still in beta. While ARFoundation and ARSubsystems 2.2 provide interfaces for ARKit 3 features, only Unity's ARKit XR Plugin 2.2 package contains _support_ for these features and _requires_ Xcode 11 beta and iOS 13 beta. Unity's ARKit XR Plugin 2.2 is not backwards compatible with previous versions of Xcode or iOS.
The same is also true for Unity's ARKit Face Tracking package 1.1: it _requires_ Xcode 11 beta and iOS 13 beta.
|ARKit XR Plugin|Xcode Version|iOS Version|
|Unity ARKit XR Plugin|Unity ARKit Face Tracking|Xcode Version|iOS Version|
|2.2 |11 beta |13 beta|
|2.1 |9 or 10| 11 or 12|
|2.2 |1.1 |11 beta |13 beta|
|2.1 |1.0 |9 or 10| 11 or 12|
This distinciton is temporary. Once iOS 13 is no longer in beta, the ARKit package is expected to work with all versions of Xcode 9+ and iOS 11+.
GitHub