Yesterday I bought a new 21.5" iMac from the Apple Store in Regent Street. It won't print. This morning I gave up and called Apple Care. I spent 2 hours and 10 minutes on the phone with them without any solution. The guy admitted he was completely baffled. I still cannot print from the iMac. I have a Konica Minolta Magicolor 2450 and a Toshiba e-Studio 16s networked in my office through AirPort Extreme. I have no problems printing wirelessly to these printers using my MacBook Pro on 10.5.8 and my MacBook on 10.5.8. I copied my data and the settings from the MacBook to the iMac using Migration Assistant. The PPDs were not copied across. I downloaded new PPDs from Konica and Toshiba and installed them. The iMac will not see either of the printers which are on an AppleTalk Local Zone. The Add Printer option on the 10.6 iMac has "Default | Fax | IP | Windows" while on the 10.5 MacBook Pro I have "Default | Fax | IP | Windows | Bluetooth | AppleTalk | More Printers" and the two wirelessly networked printers appear under the AppleTalk window. I connected each printer directly to the iMac using an ethernet cable. It still wouldn't see them. What am I doing wrong? We figured out a convoluted workaround. By checking Sharing Printers on the iMac, MacBook and MacBook Pro, I can finally see the printers, but this means I must have at least two computers running in order to print. Not a satisfactory solution.