Scanner error - Failed to open a connection to the device (-21345)
After MacOS Sequoia v15 update, the image Scanner is no longer working. The error message says "Failed to open a connection to the device (-21345)"
I have a Mac, wirelessly connected to a Brother MFC-J985DW printer. Using Sequoia operating system.
Tried unplugging printer, printer power cable, and then replugging everything after several minutes. No luck.
Finally I found the following solution that worked for me:
- go to the System Settings:
- Click on Privacy & Security
- Click Local Network
- Enable the printer / scanner that was throwing error.
MacBook Pro 16″, macOS 15.0