If your HP printer suddenly refuses to print and your Mac or Windows PC shows an “Expired Certificate – Check the printer for errors” message, you’ve landed ...

Mac users who upgraded to Snow Leopard on Friday began reporting problems with Hewlett-Packard (HP) printers within hours of Apple launching the upgrade, according to the company’s support forums.

When your Mac fails to communicate with your printer, it can be a frustrating experience, especially when you need to print important documents. Here are some detailed steps and tips to help you ...