According to some scattered user reports, updating macOS to Sonoma 14.4 is causing some USB hubs embedded in monitors to stop working and there doesn't seem to be a clear fix.
On Tuesday, AppleInsider reader Matt wrote to alert us that after updating his MacBook to macOS Sonoma 14.4, his monitor's USB hub no longer works. As it turns out, Matt isn't the only one with this problem.
Reddit threads show that users seem to have the problem on Dell, Samsung, and Gigabyte monitors so far. While the problem seems to mostly affect the USB hubs in monitors, a few users have reported that the update has caused some monitors as a whole to become unresponsive.
More reports have also been found on X, formerly Twitter.
Love that macOS 14.4 has completely killed the use of my display KVM. Just not picking up any USB devices plugged into my monitor (or even that my monitor is a USB hub too).
— Rhys Morgan (@rhysmorgan) March 8, 2024
There's no fix that seems to work for all users. However, a few have found luck by completely powering down their monitors and restarting them, or re-enabling the "allow accessories to connect" prompt in system settings.
How to allow accessories to connect on macOS 14.4
- Open Settings
- Click Privacy & Security
- Click Allow accessories to connect
AppleInsider was not able to duplicate the problem with Apple and LG monitors that rely on USB-C or Thunderbolt connections. The problem does not seem to extend to standalone hubs either. It's not clear what the commonalities are between reports.
For the time being, if you rely on a USB hub in a monitor, it may be wise to wait to update if you haven't already. The update in question was released on March 7.
14 Comments
MacOS Sonoma has been the worst MacOS release for Intel-based machines ever. I'm still on MacOS 14.2 because each point-release update has result in bricking my 2020 iMac and my having to reinstall MacOS, and only with a USB install drive. Headlines like these makes me wonder if Apple has abandoned any real QC checks with Intel machines. For the first time ever, I'm seriously considering downgrading my iMac to macOS Monterey as it was completely stable.
My dock now has devices falling off it like trained acrobats.
It's a powered OWC dock. It now can't support all the devices connected it to it for two years complaining of a lack of power.
I have a LG 40WP95C-W connected to my Mac Studio via Thunderbolt. I’ve been using the LG’s two USB ports for Logitech RF dongles. These stopped working after the Sonoma update. I unplugged them, then plugged them back in, power cycled the monitor and rebooted the Studio and they worked again.