Note: It looks like Apple now has the correct drivers available for direct download and upgrade. None of this should be required anymore.
Got a Hewlett Packard printer? Got Snow Leopard? Apple and HP report that the OS X 10.6 install DVD includes all required drivers and software, but it didn’t work for me. I went to look for the driver software on the Apple and HP web sites and you will find a list of supported printers, including many, many HP models. But the support article (entitled “HP Printer Drivers for Mac OS X v10.6“) redirects to the Ricoh drivers, and the HP drivers are MIA.
Poking around the site and trying different URLs, I am pleased to report that I have located the missing driver package! HP printer drivers for Mac OS X 10.6 Snow Leopard may be found here: http://support.apple.com/downloads/DL907/en_US/HewlettPackardPrinterDrivers2.0.dmg Note that this driver package is labeled “2.0” but it includes the version 3.0 HP drivers which are (allegedly) included in the install DVD.
HP officially states that users should not use their Leopard software (Scan Pro, etc) under Snow Leopard. Indeed, users should uninstall any existing HP software and use the included drivers and software. Like the previous Apple drivers, this install interferes with HP’s scanner functions anyway, so they won’t work.
So, to sum up, users of Snow Leopard should uninstall any existing HP software and install the official Apple software through Software Update or from the support web site. You should then be able to print and scan (through Preview) for compatible HP devices.