On my Mac, I've tried Firefox, Chrome, Safari

On Linux, I've tried Iceweasel and Firefox

On Windows, I've tried Edge

All of these state that the browser is not optimal and things either never render, or in the case of FF, render after about 2-3 minutes per click. Beyond the occasional break in speed, the browsers are completely inoperational. 

I'm at the end of the "oVirt Installation" in the oVirt Quick Start Guide (https://www.ovirt.org/documentation/quickstart/quickstart-guide/). There's a lot of mention around Spice, but I think that's something further down the road after I can interact with the Engine portal.

Any help would be appreciated on figuring out what secret handshake is needed to get a usable browser

oVirt Engine:

CentOS 7.2