Admix is planning to support most of the popular Graphics APIs, but currently Admix SDK v 1.9 and lower only supports the following Graphics APIs:
|OpenGLES 2||OpenGLES 2||OpenGLCore||Metal||WebGL is not supported yet|
How to change the Graphics API in a Unity project
Graphics APIs in Unity can be checked and changed in the Menu. To do so click: File → Unity Build Settings → Player Settings → Other Settings → Disable Auto Graphics API → Choose needed API → Move it to the top → Remove the unneeded API from the list.