[XR] Editor freezes when using ARCore instant preview on Mac

Steps to reproduce :

1) Open the attached project or download from https://github.com/google-ar/arcore-unity-sdk
2) Open scene Test selection
3) Click on HelloAR button from the menu.
4) Connect any device from this list
https://developers.google.com/ar/discover/supported-devices
5) Press play in Editor and when prompted to run the ARCore setup on the
device. Nothing is seen on the device as ARCore instant preview
doesn’t work and the Editor freezes

Expected result: ARCore instant preview should work smoothly as the device screen view is shown on Editor.

Actual result: Editor freezes and black screen is rendered on the device.

Reproducible on: 2018.3.0a1, 2018.2.0b3, 2018.1.0b1, 2017.3.0f3, 2017.2.0f3, 2017.1.0f1

Environment: Mac 10.12 and Mac 10.13 only. Works fine on windows