The 2nd Android O developer preview was only released a couple of days ago, but it’s already getting another update. Google has released a minor update to Pixel and Nexus owners. The update reportedly fixes Android Pay, at least partially.
The update apparently fixes the “unsupported in this build” message when you open Android Pay. However, this could just be a server side fix, because some users are reporting the same thing without installing the update. That’s good news because users are reporting issues with the update on the Nexus 6P and Nexus 5X devices.
Have you had any luck installing this minor update? Have you tried using Android Pay?