How to Fix Usb hub / keyboard disconnecting on log in. Needs to be unplugged and replugged
Hardware issues after macOS updates often require re-applying root patches, resetting SMC/NVRAM, or checking physical health.
Quick Fix Steps
- Reset NVRAM/SMC: Use OpenCore picker for NVRAM; follow model-specific SMC reset.
- Re-apply patches: Open OCLP, run Post-Install Root Patch, reboot.
- Check battery health: System Settings > Battery > cycle count.
- Test without utilities: Disable battery limiters and login items.
Verification
- Issue persists after cold boot.
- Battery drain normal over two cycles.
Related Searches
Original Question: "[SOLVED] Usb hub / keyboard disconnecting on log in. Needs to be unplugged and replugged."
I have a usb 2.0 keyboard with two usb ports. It shows itself to the operating system as a usb hub with the keyboard just plugged into to one of the usb ports on this hub (hub vendor: TERMINUS TECHNOLOGY INC., keyboard: SONiX).
I could type my password at the log in screen but when macos loads, the keyboard will cut out. I tried mapping the usb ports using corpnewt's tool and a few other things but nothing has worked so far.
The keyboard will work, however, if I unplug and then plug it back it. This lasts after sleeping but not after logging out (need to unplug and plug again).
To solve this problem I wrote a script that waits a bit then reenumerates the usb keyboard using apple's USB prober tool (see link). It's a hacky solution but it works, is completely invisible and only needs to be performed on reset / login once.
Stack exchange link with link to tool:
https://apple.stackexchange.com/a/321009
I hope this helps someone. It caused me a lot of grief.
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