I have a feeling it's related to the recent 10.9.2 update to Mavericks. If it was working correctly, I would have expected my wireless printer to show up in this box with "Bonjour" out to the right, but no printers appear at all. I have tried following the directions to setting up a wireless printer, but going to "Print/Scan" and clicking the "+" button results in no printers being recognized by my Mac. The printer itself is connected to my home network, so there must be a problem with my Mac. Hey, I've been having all sorts of problems printing wirelessly to my HP D110 printer lately from my MacBook Pro.