Hello Barryghall.
The printer has the ability to track how many pages it has printed, but it is unable to check the page count per toner cartridge. The "In Use" issue would point to the wrong driver being used or a poor network connection. You can try downloading and installing the PS Printer Driver & Utilities for Mac V4.17.14 from our Canon USA site.
Once the drivers have been downloaded, you can click Click on the apple in the upper left hand corner of the screen and then click on system preferences. Once in system preferences click on Printers and Scanners. In printers and scanners, you can try using the - at the bottom of the list to remove any connections for the printer.
Once the printer has been cleared from the list, you can click the + and the add printer window will appear. You can highlight the printer and before clicking add, make sure the printer name appears in the USE drop down box near the add button.
If you continue to have issues reaching the printer, you can try unplugging your router from the power for 5 seconds to see if the communication comes back online or you can try moving the printer to get a better signal.
If the problem persist, I would suggest contacting support over the phone at 1-800-652-2666, our agents would be happy to assist.
