Lost Canon scanner with El Capitan
QI’ve just updated my iMac to El Capitan. Although I can still print normally to my Canon Pixma MG4250, I can’t use its scanner, despite that feature working normally from a laptop running Windows 7. Does El Capitan not support this model’s scanning capability?
AEl Capitan does support your device, both as a printer and a scanner. Sometimes it takes a little cajoling to get this going, though. To begin, uninstall all Canon software for it, particularly any which has been migrated from previous versions of OS X. Next up, disconnect the printer: open the Printers & Scanners pane in System Preferences, select the currently installed printer and click the – (minus) button below the list of devices to remove it. Repeat this for it as a scanner.
Next, open the App Store app and install any OS X updates that it offers. Reconnect your printer to the Mac and power it up. When it’s ready to use, open Printers & Scanners, and install the device there again, both as a printer and a scanner. Check again for any App Store updates, as installation sometimes triggers additional updates.
If that still doesn’t get the scanner working properly, visit Canon’s support site, download its software for El Capitan, then remove the printer as described above, reconnect the hardware and install Canon’s software instead.
If your scanner is no longer accessible after an OS X upgrade, try removing it from the Printers & Scanners pane and adding it again.