Printer issue/System resent issue

[fpublic]

3. Reset parameter ram (PRAM)

A small amount of your computer’s memory, called “parameter random-access memory” or PRAM, stores certain settings in a location that OS X can access quickly. The particular settings that are stored depend on your type of Mac and the types of devices connected to it. The settings include your designated startup disk, display resolution, speaker volume, and other information.

Resetting PRAM is the most common solution mentioned at Apple Support (although the restart key combination that you listed is not a PRAM operation as far as I know). PRAM covers a list of "common settings" that could include your printer.

Rather than OS version, restart key combinations seem to be hardware specific so I would refer to the user manual for your particular iMac model: http://support.apple.com/manuals/#imac
It lists iMacs from newest to older. The User Manuals have a chapter on Problems/Solutions that give restart and reset instructions for the hardware.

Good luck.