Will a wireless printer work without Wi-Fi?
Even in this case, an Internet connection is not required, because the router handles communication between the devices on the local network. Even if Web access is unavailable, Wi-Fi-enabled printers can be used as normal, provided the router and the wireless adaptors on the network are functioning correctly.
How do I connect my printer to my computer without Internet?
Plug the printer into your computer using a USB cable. The USB cable should plug into a USB port on your computer’s housing. If your Mac doesn’t have a traditional USB port, you’ll need to buy a USB-C-to-USB adapter for your Mac. Your computer must be turned on and logged in when you do this.