I have a MAC and suddenly I can't print from the internet webpages. The image I want to print only appears in the print window when I choose "print to pdf" as destination. If I choose my printer, the image is not captured and it indicates printer not installed...or something else. I don't know how this happened. I have uninstalled and reinstalled the printer, and same thing happens. Help???
So that the Community can help you better, we will need to know more information.
What exact model printer are you using (usually on the top or front of the unit)?
Do you see any error messages?
Which version of macOS are you using?
How do you connect to your printer (USB or WiFi)?
Any other details you'd like to give will only help the Community better understand your issue.
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The issue that you are describing points to a problem with the web browser on the computer selecting the correct printer. In this situation, you can try updating the web browser you are printing from or clicking on the option in the print window to change the destination to see if you can select the MF644.
If that does not resolve the issue, to assist further, we would need some additional information. If you could reply to this message with information below, we can continue to assist. For a more immediate resolution, you can contact support at 1-800-652-2666. Our agents would be happy to help.