Model: HP Deskjet 640u printer, Version: 2.1
Operating System: Mac OS (Note: might work with other versions of this os.)
DeskJet 825, 845, 900-series,, cp1160-series, cp1170 series, cp1700-series, 3820-series, 6120-series, and 5550-series.
It is for use with Mac OS X 10.1.5 & OS X 10.2+. The downloadable file includes a driver installer, which also installs the newest deskjet printer utility.
This release improves the following:
The installation routine for customers having problems,
Some printer performance issues.
Problems with spooled jobs not printing.
Fixes duplex printing over AppleTalk.
Download and Install Instructions:
Download the driver from www.hp.com
Uncompress the file with Stuffit Expander
Launch the "hp inkjet installer" program, and follow the on-screen instructions.