I know that OS X is an operating system but don't know what mine is or where to find that information.
You can find that by clicking the top left of screen then "About this Mac" and it will show the OS X Version. And just for FYI if you click on the OS X version number it will show the Build of your Mac and click it again and it will show you the Serial Number, just incase you ever need to find those 2 things
Are you on a WiFi Network ?? If so i find it easier to get my Printer on the same WiFi network as my Mac and then through System Preferences>Print and Scan Add the printer there by clicking the + button at the bottom of the left window. I find if i do it this way that because it finds it over the air, i never have the Offline problem.
First though, delete the printer and try adding it again. If you can only do it being hardwired into the printer, still delete it and add it again.
I suppose before hand look for any OS X Drivers that it might need by checking the Software Update while hooked up to the printer before deleting and starting again.
Click the >Software Update and that should open up the MAS and see if the Printer has any drivers that need updating . . .
HTH
Cheers