Visit your computer’s System Preferences and click the Printers & Scanners option.
If there is an applicable update, download it and install using the instructions from your manufacturer.
BROTHER PRINTER SCAN TO COMPUTER MAC MAC OS
Start by checking for newer versions of your scanner’s software that are compatible with your Mac OS 10.10 operating system. Follow these instructions in order, and stop at any point if the scanner starts working again. If you know everything is connected and has power, there are more advanced troubleshooting steps that you can take.
BROTHER PRINTER SCAN TO COMPUTER MAC MAC OS X
If none of these steps get your scanner working again, there could be another issue impacting your computer and device ensuring you cannot scan after upgrading to Mac OS X 10.10. Lights on the device will often blink if there is a connectivity issue, or you can try printing a test page from your computer to ensure the device is working if it is a print/scan model.
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