Failed to open connection to Canon TS5150 for scanning on Monterey 12.7.6

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Level 1

22 points

Failed to open connection to Canon TS5150 for scanning on Monterey 12.7.6

Running Monterey 12.7.6 (2015 Macbook Pro) and all of a sudden can't Scan on my Canon TS5150. I get this error; failed to open a connection to the device (-21345)

I've seen other instances of this on this forum but can't find a fix which works. The fact it's worked for years and now doesn't is baffling - something has changed but see below.

Printing is fine. I've removed and added the printer several times. It's been powered off/ on but I haven't done a factory reset on the printer - suspect that's my next option.

O/S hasn't been updated recently & no other obvious software changes. I have tried Image Capture - printer shows up but fails with the same error.

[Re-Titled by Moderator]

Original Title: No longer able to scan on Canon TS5150 - failed to open a connection to the device (-21345)

MacBook Pro 13″, macOS 12.7

Posted on Oct 26, 2025 3:11 AM

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Answer 1

Top-ranking reply

VikingOSX

Level 10

122,832 points

Oct 29, 2025 7:56 AM in response to Sredski

Canon now states that the PIXMA TS5150 has been made an AirPrint device with regard to drivers for Monterey. Canon offers no drivers for this device and Monterey, as they expect you to configure it as a networked, Apple AirPrint device. Attempting to install drivers for older versions of macOS may result in your current inoperable experience.

See this Canon guide for how to configure your TS5150 for AirPrint. There is also a section on that document about how to configure and use your scanner in an AirPrint configuration. You may want to bookmark that link.

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Answer 2

Ronasara

Level 6

15,519 points

Oct 26, 2025 8:10 AM in response to Sredski

I would first try reinstalling the Cannon scanner software and if that doesn't work, contact Cannon support for help. There may be a problem with the unit itself.

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Answer 3

Sredski Author

Level 1

22 points

Oct 26, 2025 6:57 AM in response to Sredski

OK, I've performed a factory reset on the printer & updated the firmware (3.00) - no change and have also tried scanning from the printer directly - no joy :-(

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Answer 4

Sredski Author

Level 1

22 points

Oct 26, 2025 1:11 PM in response to Sredski

Also reinstalled all Canon software.

I'm more drawn to it being an Apple problem as it seems to affect various brands of printer.

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Answer 5

Sredski Author

Level 1

22 points

Oct 28, 2025 2:00 PM in response to Sredski

OK, I've just spotted these Xprotect updates - could one of these be a culprit?

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