I recently moved and am using a new WIFI. I have set up my Mac and my printer both with the same WIFI. They are both connected and when I tried to print, my computer couldn't "find" the printer. I deleted the printer from the list of printers on my Mac to try and add it back, but now it won't even show up to add back. How can I connect my HP Envy 4500 printer to my MacBook Air again?