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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:

  1. go to the System Settings:
  2. Click on Privacy & Security
  3. Click Local Network
  4. Enable the printer / scanner that was throwing error.

MacBook Pro 16″, macOS 15.0

Posted on Sep 30, 2024 11:33 AM

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Question marked as Top-ranking reply

Posted on Nov 19, 2024 3:19 AM

Thank you , it worked for me


3 replies

Scanner error - Failed to open a connection to the device (-21345)

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