I understand your printer is not printing from iMac or from iPhone.
Don't worry I'd like to help you out.
Did you make any changes to your printer?
Are you able to make a copy from your printer?
Please try the steps recommended below.
Resetting power to the printer forces the printer to reset stored values in the firmware. A power reset can help when the printer is not accepting communication from the Mac.
Make sure the printer is idle, not making any sounds, before continuing.
With the printer turned on, disconnect the power cord from the rear of the printer.
Unplug the power cord from the wall outlet.
Wait at least 60 seconds.
Plug the power cord back into the wall outlet.
Reconnect the power cord to the rear of the printer.
If the printer does not turn on by itself, press the Power button to turn it on.
Try printing again and note what happens.
If the printer prints, you can stop troubleshooting.
If the print job becomes stuck again, continue to the next step.
Refer this article to further troubleshoot Printer Offline' or 'Printer Not Responding' errors.
Let me know if this works!
Have a pleasant day ahead! 🙂
A4Apollo I am an HP Employee
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