Push notifications seem to be a feature added in Xenforo 2.1:
Maybe something that needs to be enabled on @thiggins's side?
This doesn't work on iOS however. Maybe in a few years they will catch on, like they recently did with homepage widgets <cough>.
XF 2.1 - Push notifications
Welcome to the first of our "Have you seen...?" series for XenForo 2.1. We've got a lot to show you over the course of the next few weeks so you may well be hearing from us quite frequently... To ensure you're kept up to date, we strongly recommend clicking the "Watch forum" link here and...
xenforo.com
Maybe something that needs to be enabled on @thiggins's side?
This doesn't work on iOS however. Maybe in a few years they will catch on, like they recently did with homepage widgets <cough>.