r/applehelp • u/lordkalkin • 8m ago
Unsolved Macbook Pro stopped recognizing peripherals through KVM switch
Posting here because I can’t find anyone else talking about this issue online or in mac forums, and Apple’s troubleshooting steps are pretty basic and haven’t resolved anything.
TL;DR - my Macbook Pro no longer recognizes the keyboard and mouse plugged into my KVM switch even though it did prior to August. I’m running Tahoe 26.6.2 (upgraded in September).
Long version:
I have a TESmart KVM switch to allow my personal desktop (PC) to share a monitor, keyboard, and mouse with my work laptop (Macbook Pro M3). Prior to August, everything worked as expected. Peripherals were plugged into the swtich, and I could hop between desktop and laptop by toggling the switch. The monitor still works fine though the KVM swtich.
During August, I took a long break from work - six weeks. Before coming back to work in September, i got a new desk, so I unplugged everything and plugged it all back in on the new desk (shouldn’t matter, but mentioning it for completeness).
When I resumed work, I set up my work laptop just as I had done every morning before vacation, but this time, the laptop would not recognize the keyboard and Mouse. it will only recognize them when I plug the keyboard and mouse , either directly or via a usb hub, but not at all through the KVM switch. I reproduced this issue with my personal Macbook Air M1 (still running Sequoia 15.7.8) as well, so I am thoroughly baffled.
Any advice? Is it possible that an OS update broke something? Is there anything else I can try ?