FarmerBob

Is this router setup in AP mode? If your Windows clients are setup on the 2nd router but your Mac is on the first this could explain why the Mac can't see the printer.
 
Can it ping the printers IP?

no, you will need a wifi adapter to support 5ghz.. the antenna means nothing if the chip on the card doesnt know how to use it. 

I had CL Gigabit Fiber install last March and until the end of June, I was able to logon with any router that could do Tagged 201 VLANs. Then all of a sudden it stopped except for their dispensed gear. Lately things have gotten a bit better, but it's still a pain. I have been able to to get some Netgear, Linksys, Microtik, but can not get an Amped Wireless R20000G that can do Tagged VLANs that are a bit convoluted for others that need extended features. But it is too much for this operation. I have contacted AW and they tried, but only as much as they had to . . . no joy.
 
Does anyone have any insight on how to or what to look for or what needs to be covered to get these/any devices to connect?
 
Any assistance will be greatly appreciated.
Thank you . . .
. . . fb
 

I think the OP needs one of these: 
 

Did you check if the router UI has an option to change WiFi signal strength/antenna power?

So it's not a "Modem" that the AP is connected to but a "Router". The Black Box that the Fiber is connected to is an ONT, Optical Network Terminal, that turns Optical to Ethernet that will connect to your Router that you will use to Login to your account and it will distribute Internet and internal interconnects, LAN connections to your other hardwired gear. It sounds like it's not the "Router" blocking. It sounds more like the install of the AP is incomplete. If it's a "Stand-Alone" unit and it's physically connected to your "Router" and there is a light lit for the port it's connected to, you'll need to set up the AP as a "Stand-Alone" unit. It's obviously not completely set up for the Router to connect it to the Internet. Reset the AP to Factory Settings using the pin-hole and reinstall using the Mobile App only as a "Stand-Alone" unit and that should allow you to do what you need to get it to the Internet without using the Controller which you may have set it up to require the Controller to be continuously operational for APs to work. (Which I Love!!)
 
Hope this helps. That's the way I have done many "Stand-Alone" units.

Thank you so much for the information and the links! 
 
i will look in to it and see what i can do. ❤️