A recent update to macOS Sonoma 14.4 has led to unexpected issues with USB hubs embedded in monitors, rendering them non-functional for a number of users. Reports have emerged from owners of various brands, including Dell, Samsung, and Gigabyte, indicating a widespread problem without a straightforward resolution.
One AppleInsider reader, Matt, reported the issue upon updating his MacBook, discovering that the USB hub in his monitor ceased to function. Similar accounts have surfaced across Reddit and X (formerly Twitter), suggesting that the issue may not be isolated to a specific monitor manufacturer. In some cases, the update has even caused monitors to become completely unresponsive.
Attempts to rectify the situation have seen mixed success. Some users have managed to restore functionality by powering down their monitors completely and rebooting, or by adjusting system settings to re-enable accessory connections. Specifically, users can navigate to Settings > Privacy & Security > Allow accessories to connect in an effort to resolve the issue.
Investigations by AppleInsider, using Apple and LG monitors that utilize USB-C or Thunderbolt connections, failed to replicate the problem, indicating that the issue might be confined to certain configurations or connection types. The lack of a clear pattern or solution has left affected users searching for workarounds.
Given the current uncertainty and the critical role that USB hubs can play in user setups, those dependent on monitor-embedded USB hubs might consider postponing the macOS Sonoma 14.4 update. The issue first came to light following the update's release on March 7, and as of now, a definitive fix has yet to be identified.
