I noticed that in the latest snapshot on the Mac there is no Overlay option anymore.
I was using: Mumble-Snapshot-1.2.3-rc2-20-g2da7fb6
And overlay was working great with no issues.
I upgraded to: Mumble-Universal-Snapshot-1-1.2.3-rc3-5-g520ad96
Now there is no overlay tab in the new options pane at all. Even with the "Advanced" checked. Is the overlay now a plugin that I need to download seperately?