@Richard_K2, Welcome to the HP Support Community!
I understand you are not able to print in color from your Mac. Try making a standalone copy in color and check if that works. By this, we can conclude if this is a hardware or a driver issue.
Update the printer firmware
Click here to download and install the latest printer firmware from your Mac.
Click here to know different methods of updating printer firmware.
Also, check for any software updates on Mac
Click the Apple icon > About This Mac > Software Update and install any available update.
- Which application are you trying to print from?
- Have you tried printing different types of documents like PDF, Word, or Webpages and check if the issue persists?
Check the print settings and make sure the 'Black and white' box is not checked.

For more info, refer to - Print Settings Guide (Mac)
Hope this helps! Keep me posted.
Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!
Have a great day!
KUMAR0307
I am an HP Employee