Air Print
None of my ios devices (IMac, Iphone 5, Ipad) can locate my wirelss printer. HP Photosmart 5520 which is definitely successfully connected to my home wifi network. I've checked and rechecked the wireless settings, rebooted EVERYTHING, updated EVERYTHING and nothing works. My Mac has never played nicely with it but it did work at one point. Now, it doesn't even appear in the add printer box. It's just gone. My mobile devices both say "No Air Printers Found".
iMac, Mac OS X (10.7.3)