Prints only color on Mac when HP presets set to Black Ink Only. Safari prints Black in Only OK. This is a Firefox problem only.
Using MacBook Pro with Mac OS 10.12 and Firefox 50.10. and HP 3050A. I was able to print black ink only on the same HP printer using Firefox 48.0.2 on Mac OS 10.7.5. But now that I've upgraded, Firefox will not print black only with preset se to Grayscale and Blank Ink only.
Using MacBook Pro with Mac OS 10.12 and Firefox 50.10. and HP 3050A.
I was able to print black ink only on the same HP printer using Firefox 48.0.2 on Mac OS 10.7.5. But now that I've upgraded, Firefox will not print black only with preset se to Grayscale and Blank Ink only.
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Learn how to print pictures and other documents from your Mac to a printer.
https://support.apple.com/en-us/HT204135
Resolve printer issues on your Mac
https://support.apple.com/en-ca/HT203343
Thanks yetiputer. I'll try those suggestions. May take a day or two with Christmas coming. Will let you know results.yetiputer said
Learn how to print pictures and other documents from your Mac to a printer. https://support.apple.com/en-us/HT204135 Resolve printer issues on your Mac https://support.apple.com/en-ca/HT203343
yetiputer said
Learn how to print pictures and other documents from your Mac to a printer. https://support.apple.com/en-us/HT204135 Resolve printer issues on your Mac https://support.apple.com/en-ca/HT203343