Out of curiousity. . .what type of connection are you using the print to the 1055? Are you using a Jet Direct, or a USB / Parallel?
Oh. . .and I used to work in DesignJet support for HP. . .for every one good person there is to talk to. . .there are 7 other knuckle dragging, nose picking, "wut's a kawmputor?" slobs to help you with the following methods:
-Get your information
-15 minutes later of giving said information, they have you reboot the machine, and printer.
-"hmm. . .that didn't work. . .let me put you on hold while I do some research. . ."
-15 minutes later, "Let's go ahead and update the firmware. . ."
-if firmware is current, then let's re-install the printer drivers
-if drivers don't work, you're placed on hold again
-if you're printing to a jet direct card, you are then forwarded to the jet direct group.
-jet direct runs tests with you on the card, and then sends you back to the designjet que. . .usually to another knuckle dragger (see first step)
-rinse, lather, repeat, for a few times, until you talk to an 'engineer', which then blames your network, computer, or operating system; stating that there is absolutely no problem with the printer, and that YOU need to go back 2-3 versions of your current operating system. . .
I didn't support the 1055 when I was there, but I remember everyone cried when they got a multiroll call. Hell. . .it barely worked well in it's native windows / windoze environment. It might be worth your while, setting up a cheap windoze 2000 or XP system, and share the printer with the appletalk option. . .just a thought. I highly doubt that you'll be too succesfull trying to get it to run from the MAC environ with the full multiroll capabilities. . .
If you'd like some help, feel free to reply, or PM me.