Hello, i got this printer for free when i got my macbook last year. i have not used it since i had another printer but i set it up lately. For some reason it won't print black in black, rather it skips it so if anything is black on my document it will not print. It does then when viewing a pdf in viewer. I printed another document and it was fine. Does anyone have any suggestions. I already searched and i downloaded the latest drivers from HP but it is still not working, someone please help! Thanks