Since I updated my OS to Mojave, I have not been able to print pictures, only Word document. What should I do?
I am using a MacBook Air.
My guess is that it isn't pictures themselves, it is sandbox apps (Safari/Preview/Mail/Pages) that don't work.
MY guess is you need to finish updating the mac and reinstall the driver (Apple broke Library validation, that didn't fix it until macOS 10.15