MP240 series CUPS Printer Driver Ver. 10.84.2.0 (OS X 10.5/10.6) This file is a printer driver for Canon IJ printers. For Mac OS X v10.6, 9th January 2017.

The last printer driver that Canon released for the MP240 was for OS X 10.9. Here is a from Canon Australia. This driver should install and work on Yosemite, although its installation may be blocked by Gatekeeper. To get past Gatekeeper, hold down the Control button and click the printer driver installer. A pop-up menu will appear - select Open. You will now get the option to install the driver. Before installing this driver I suggest you remove the MP240 from Printers & Scanners and then run the driver installer.

When that has completed, restart the Mac and then try to add the printer and then see if this will let you print. The last printer driver that Canon released for the MP240 was for OS X 10.9.

Download bootable os x for mac. Here is a from Canon Australia. This driver should install and work on Yosemite, although its installation may be blocked by Gatekeeper. To get past Gatekeeper, hold down the Control button and click the printer driver installer. A pop-up menu will appear - select Open. You will now get the option to install the driver. Before installing this driver I suggest you remove the MP240 from Printers & Scanners and then run the driver installer.

When that has completed, restart the Mac and then try to add the printer and then see if this will let you print. I was also having this issue with my scanner after installing the Australian driver (thanks to PAHU for getting the printer working). After poking around on their website, I downloaded this driver for the scanner: After installing, I can go into my applications and open the scanner (MP Navigator EX) from the folder Cannon Utilities. The printer still doesn't do anything if I press the scan button directly on the printer itself, but I just was able to scan several documents using the prompts through the MP Navigator EX program. Hope this helps you. Apple Footer • This site contains user submitted content, comments and opinions and is for informational purposes only. Apple may provide or recommend responses as a possible solution based on the information provided; every potential issue may involve several factors not detailed in the conversations captured in an electronic forum and Apple can therefore provide no guarantee as to the efficacy of any proposed solutions on the community forums.

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Many printers and scanners use driverless technologies such as AirPrint or IPP Everywhere, which don't require additional drivers on your Mac. But third-party drivers might still be available for older devices that do require a driver. Always before connecting the device to your Mac for the first time.