Hi emersoncanon,
To resolve this, please follow these steps:
1. Click on the Apple Menu.
2. Click on System Preferences.
3. Click on Print and Fax under Hardware.
4. Highlight any PIXMA MX340 and click the <-> to remove it. Click Yes to remove the driver. Repeat until all PIXMA MX340s are removed.
5. Click the <+> to add a printer.
6. In the Printer Browser, click the More Printers button.
7. Click on Canon IJ Network in this list to highlight it and click Add.
Printing should now be possible.
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