Some Mac users are discovering that USB-C hubs and external monitors are no longer working with their Mac after updating to macOS Sonoma 14.4. This issue can apparently impact anything connected to the USB Hub as well, leaving the USB hub devices undetected by the Mac, including keyboards, mice, external displays, SD card readers, cameras, external hard drives and storage devices, and basically any other USB accessory that connects to the USB-C hub and then to the Mac.
Many Mac users rely on dongles and USB-C hubs (like this) to expand their port options, particularly after Apple started removing ports from their laptop lineup of computers. This includes all modern models of MacBook Air, which only have two USB-C ports, and many MacBook Pro models, many of which also only have two USB-C ports. Many users of the newest MacBook Pro models with more hardware port options continue to require USB-C hubs, as well as many Mac users with iMac, Mac mini, or even Mac Pro.
If you’re a Mac user who relies on a USB-C hub to expand your port options, and you have not yet updated to macOS Sonoma 14.4, you may wish to hold off on the system update until this issue gets resolved.
If you’re already impacted by this USB Hub issue, read on to find a potential fix, as well as a workaround.
Possible Fix #1: Change Accessories Connection Settings in MacOS
Some users have reported the following steps to have fixed the problem, though not everyone reports success with this:
- Go to “System Settings” in macOS Sonoma, then go to “Privacy & Security”
- Scroll down and find the setting for “Allow accessories to connect” and choose ‘Ask Every Time’ from the dropdown list
- Now disconnect all USB-C hubs and devices connected to the Mac
- Restart the Mac by going to the Apple menu and choosing “Restart”
- After the Mac boots back up, reconnect the USB-C hub and/or external displays and accessories
- Agree to “Allow” the connection of that device to the Mac
If this works for you, your devices will immediately work again with the Mac, as expected. If it does not work for you, the USB-C hub will continue to be inaccessible along with any device connected to the Mac through it.
Workaround #2: Ditch the USB Hub & Connect Directly to the Mac, Temporarily
The second option, which is not a fix, but instead a temporary workaround, is to skip using the USB-C / USB3 hub temporarily.
Instead of using the USB hub, connect your essential accessories and peripherals directly to the Mac.
For example, connect an external display directly to the Mac with a USB-C/Thunderbolt connection.
Note that a side effect of this bug or issue is that even if the external monitor/display works with the Mac, if you are using the external display as a USB Hub or it’s additional ports, those additional ports may not necessarily work. You can try the aforementioned “Possible Fix #1” further up in this article and it may remedy that, otherwise it’s a matter of waiting for a fix from Apple.
With limited port options on many Macs, you will therefore need to prioritize what devices you need connected to the Mac, and you may be having to hot-swap or juggle connections as those devices or accessories are needed. This is obviously an easier task if you use a Bluetooth external keyboard and mouse for your Mac (or the built-in keyboard and trackpad on the MacBook line), but if you use wired keyboard and mouse connections you may have a greater challenge with this workaround.
When will the USB Hub issue be fixed with macOS Sonoma?
Considering this was not an issue with the prior macOS Sonoma releases, and the problem seems to be related to macOS Sonoma 14.4 update, and the issue is generating a fair amount of press in the Apple web, this issue is likely to be patched relatively soon.
Apple is undoubtedly aware of the problem, and a fix is likely to be released in the near future, as macOS Sonoma 14.4.1 or similar.
AppleInsider first reported the problem, and MacRumors made note of this issue as users reported the issue in their forums, and other users across social media and elsewhere on the web, including Apple’s support forums, have shared similar difficulties.
Have you experienced any problems with USB-C hubs and connections in macOS Sonoma 14.4? Did the above solution and/or workaround work for you? Did you find another fix? Share your experiences and thoughts in the comments!