Hi quotr,
Is the unit being connected to your network? If so, please delete and add the printer to the queue.
Please open [System Preferences] > [Printers & Scanners]. Next, click the [-] sign under the printer list to delete the printer. Once the printer has been removed, please follow the instructions below to add the printer back to the window:
1. Click the [+] icon.
If another dialog box does not appear, click [Add Other Printer or Scanner] or [Add Printer or Scanner] after clicking the [+] icon.
2. Register the printer and fax.
2-B. TCP/IP Connection.
2-B-1. Click [IP], and select a print protocol from [Protocol].
If you want to use the machine in an IPv6 environment, select LPD or Socket for [Protocol].
2-B-2. Enter the IP address of the machine to [Address], and select either one of the following options from [Print Using] or [Use]: [Select Printer Software], or [Select Software].
2-B-3. Select a driver that is capable for this machine from the driver list, and click [OK].
2-B-4. Click [Add].
3. Check that this machine is added to the [Print & Fax], [Print & Scan], or [Printers & Scanners] dialog box.
4. Close the dialog box.
If you continue to have difficulties, please contact our support group using the following link:
http://Canon.us/ContactLI