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There is no driver for any version of MAC OS X near to 10.11 for the Magicolor 3300:
shows nothing beyond MAC OS X 10.6, I am sorry to have to report.
And that is the official site for Konica Minolta. Any driver for 10.11 would have to be bootleg quality, if it exists at all. Your current setup may be the best that can be achieved, sort of installing a printing server machine that is e.g. Windows 7, or the like (for which there is a driver, definitely.)
Try using Print Preview, and see if the bottom-of-print defect shows up there.
If so, can you 'trim' it off, by increasing your Bottom Margin setting, before sending the print job? it's just a thought.
Try the Universal Print Driver... it's another choice, at least.
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