Just installed HP's new driver(version 5.0.2) and utility(version 2.
for Mac OSX. When I found I couldn't print with it, called HP and was advised it wouldn't work without new firmware which is forthcoming. Ironically, the new firmware for Macs is not on their site yet but new firmware is available for windows (version 5.0.0.4). I did not see new drivers for windows and do not know if they will be required for 5.0.0.4. HP support did say "a lot of new stuff is coming out probably this week. Anyway, looks like things are changing and may be available by the time you read this.
Charlie