New macOS Sonoma update is reportedly taking down printers as well as USB hubs

Not content with playing havoc with USB hubs in some scenarios, it appears the latest update for macOS Sonoma is also a troublemaker for printers, too.

Indeed, according to various reports online as flagged up by Apple Insider, the macOS Sonoma 14.4 update is breaking printers in some cases. In other cases, there appears to be a more limited impact, in that the printer still works, but selecting page sizes doesn’t.

It seems Sonoma 14.4 is either stripping out, or messing up, printer drivers in Apple’s operating system, rendering the devices non-functional, at least for the time being in many of these reported cases.

There are users complaining about printer functionality going very wonky on Reddit and Apple’s support forums – however, there does appear to be a solution.

Namely, as stated in the above Apple post, you need to head to System Settings, and ‘Privacy & Security’ and then ‘Full Disk Access’ to grant full disk access to ‘com.microsoft.dlp’ – and that might sort the issue.

This isn’t guaranteed, mind, but there are a number of users giving the thumbs-up and saying this move did get their printer (or printers) working in macOS again.


Analysis: A cocktail of possible causes?

Seemingly the issue pertains to Microsoft Defender (which is what the above disk access change relates to), and/or JAMF mobile device management software, and possibly some other factors. It’s difficult to know exactly what, but the most prominent commonality seems to be Defender.

The good news is that this doesn’t seem to be affecting too many macOS Sonoma 14.4 users, as while there are a number of reports, they aren’t too widespread. And they appear to relate to particular configurations, too, mainly in office scenarios.

Given that, hopefully your average user at home isn’t seeing this problem – or only in rare cases. In short, you’re probably pretty unlucky if you hit this snag outside of a business network setting – but it seems that there are isolated incidents of this occuring with individual Macs.

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The latest macOS Sonoma update is reportedly breaking some USB hubs

Updating to macOS Sonoma 14.4 is breaking the functionality of some USB hubs, according to reports across the web – though it's unclear how widespread the problem is, or which particular peripherals are affected.

The heads-up first came via AppleInsider readers, but there's also some discussion on Reddit, Apple support forums, and MacRumors. So far, it appears to be just USB hubs built into monitors affected by the bug, including models from Dell, Samsung, and Gigabyte.

Judging by the number of replies to the article and threads linked above, several people are seeing this issue. That said, it doesn't appear to affect everyone with a macOS Sonoma 14.4 machine and a monitor USB hub.

Apple hasn't said anything about the issue and is unlikely to unless it becomes widespread. The 14.4 software update started rolling out last week, bringing with it new emojis and bug fixes – though it may have introduced some more bugs of its own.

Can you fix it?

macOS Sonoma bug

Changing this setting seems to help some people (Image credit: Future)

The users afflicted by the USB hub problem are trying various troubleshooting measures. There doesn't seem to be a single solution that works for everyone, across different types of monitors and USB connections.

For some, completely powering down everything and then powering it back up again seems to work. Other people have reported that heading to the Privacy & Security page in macOS System Settings and changing the Allow accessories to connect option to Ask every time, then rebooting, fixes it.

Reading between the lines, there may be something awry with the way macOS 'sees' the USB hub and the devices connected to it as peripherals, but there are a lot of links along that chain – some users have found that simply switching to a different USB cable helps.

We'll have to wait and see if Apple issues a fix for those affected. Of course, if workaround solutions are already being discovered, it's more likely that any necessary bug fixes for the problem will get quietly rolled into the macOS Sonoma 14.5 update.

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