Ok first thing you need to do a nozzle check. I'll bet you have some clogged nozzles. Not sure how to do this on a Mac. If the heads are clogged run a head cleaning. If after 1 or 2 cleanings it doesn't clear the nozzle you may need to do a head soaking. There is a good tutorial on cobra inks support page if you can't find it post here and I'll add the link
Make sure to return you density back or you'll end up with ink all over your printer.
Make sure to return you density back or you'll end up with ink all over your printer.