Check the power connection to ensure the device is turned on.If there are any blinking lights on the printer, it may not have ink or paper. If you are scanning to print, check to make sure the printer/scanner has ink and paper.

Troubleshoot Scanning Issues on Mac OS Yosemiteīefore you get frustrated with a scanner that’s not working, start with a few connection checks between the computer and the scanner. The good news is that with a few at-home troubleshooting tips, you can get your scanner back online. This issue impacted scanners from all major manufacturers, including HP, Canon, Epson, and Lexmark. In some cases, such as with the operating system update to Mac OS X Yosemite, there was a known issue with many printer/scanner devices, and users cannot scan after the update. In most cases, software updates can be set to schedule automatically without any work on your part.

One of the things that Mac users like best is the simplicity and expectation that everything will “just work”. Things to Try If You Cannot Scan After Upgrading to Mac OS X 10.10 Driver Support/ knowledgebase/ Things to Try If You Cannot Scan After Upgrading to Mac OS X 10.10.

Mac print settings wont open