I have a Macbook Pro that was not used much. Not sure it was ever connected to our FIOS network. I connect to the FIOS router fine but it does not connect out to the internet. Working fine on alternate WiFi (Phone, which I'm on currently)
My wife has a similar Macbook Pro for work that is using the FIOS network wifi/internet fine in the house. Her hardware is probably newer.
Mac OS Sierra 10.12.6
Macbook 2012 vintage.