Sequoia Problem: Logitech wireless keyboard and mouse via KVM not working M1 Mac Mini

Update: TESmart provided me the original firmware (HKS0403A1U(USB20)_KM_SOFMU16-V009_BOOT_APP.bin) and an updated firmware (HKS0403A1U(USB20)_KM_SOFMU16-V011B-APP.bin) file. The newer firmware resolved my issue, the old firmware threw an error message ("unable to parse file") when trying to run it. Also worth noting, TESmart states that only a Windows 10 or 11 machine will run their upgrade tool (.exe) that references the above firmware file. This is incorrect, I successfully used a Windows 7 desktop to fix this issue (a VM won't work though, has to be a physical machine. I tired both and they later verified it has to be a physical machine).

For PKS0402A20 users, contact them, they do have an updated firmware.

For the record, I archived the required support material at on GitHub. You need Windows 10 or 11 to run the flash tool.

francoisjacques/TESmart-PKS0402A20-upgrade-tool: Personal backup for TESmart firmware otherwise not available

I have the TESmart 3 monitor / 4 machine switch (HKS0403A1U - has USB2.0 (not 3.0)) and same problem now post Sequoia 15.1 install. I contacted TESmart and received the same firmware upgrade. However, the firmware update tool (exe) requires a Windows machine to run. I am running Parallels on my MAC Studio and run a Windows 11 VM. Unfortunately, this update tool doesn't work on VMs. TESmart is aware of this issue and verified it has to be a real Windows machine. I'm going to track that down and see it if works next.

Update: TESmart provided me the orignial firmware (HKS0403A1U(USB20)_KM_SOFMU16-V009_BOOT_APP.bin) and an updated firmware (HKS0403A1U(USB20)_KM_SOFMU16-V011B-APP.bin). The newer firmware resolved my issue.

The Tessmart fix worked for me. They sent me the firmware update tool and I followed the procedure. Not that it requires opening the unit and shorting out the chip with a precision tweezer. I used this: Amazon.com: kaverme 3PCS Precision Tweezers Set, Upgraded Anti-Static Stainless Steel of Tweezers, for Electronics, Soldering, Laboratory Work, Jewelry-Making, Model, Craft : Tools & Home Improvement

You have to reach out to TESmart technical support. They have a firmware binary but they have to give it you. It's not available for public download without their assistance. Makes sense, because if someone puts the wrong firmware on the wrong device it will break the device.

https://www.tesmart.com/pages/contact

Fill out the form and submit.

At the bottom of the page is their phone number in China. You could call if you had to.

Confirmed @james brickley post worked for me.

I had just upgraded to 15.1 sequoia and this issue happend to me. Before upgrading my set up was 2 MacBook Pros on Sonoma.

Then I reached out to TESmart team, and they gave me a hex file, and a .exe tool to update the kvm. They gave steps on the email, and a video demo. It was pretty easy to follow, and I was able to get it working again.

Attached is the link to download the TESmart software tool. However, for the hex file, you will need to reach out to them.

[Edited by Moderator]

I confirm that I had the same issue and contacting TSmart was the solution. I had to physically open my KVM and short some circuit with a wire to be able to install the firmware but their instructions were pretty clear.

It now works perfectly in Sequoia

There was another thread where someone mentioned they reached out to TESmart technical support and was provided a .bin firmware update and a software tool to apply it. Then the problem was resolved.

Similar issue where wired keyboard through TESmart KVM did not work on Mac Studio (M1 Max) side after upgrading from Sonoma to Sequoia. (Other side of KVM is an HP laptop and that worked fine.) I reverted to Sonoma from Sequoia on the Mac Studio via a Sonoma boot disk installer (with some bumps along the way). Mac Studio side works fine now on KVM, but running Sonoma, not Sequoia. Great solution for me until the issue is fixed in Sequoia.

It seems we may need a new firmware from TESmart, in the meanwhile you can plugin the keyboard and mouse wireless receiver into the port at the front for the KVM switch and things will work except the hotkey switching will not. You can switch computers using the button at the front of the KVM switch.

I'm having the same issue on my MBA M3. Logitech Pop Keys and Pebble Keys keyboards are not connecting no matter what I do and I managed to connect my mouse after minutes of trying. Before this MacBook I had MBA early 2020 i5 model and both of the keyboards and the mouse connected with no issues whatsoever. I updated that old MacBook too, it's on Sequoia now. I tried to connect my keyboards to this old one and they wouldn't connect. It was when I realized the issue was Sequoia and not my MBA M3. We are used to MacBooks being incompatible with some apps etc. but not the keyboards and mouses too now... I really hope that Apple does not leave this issue unsolved. I enjoyed using my keyboards and it's upsetting that I'm no longer to use accessories that I loved.

I have the same problem. I can get keyboard and mouse to work on the mac mini if I plug them into a usb hub then plug it into the usb 2.0 port on the kvm, but they only work on the HP PC if they are plugged into the dedicated ports. I have the firmware upgrade from tesmart but I am a bit nervous about installing it especially since I have a work around. However, I would like to solve the problem. Am I better off waiting to see if Apple solves the problem or install the kvm firmware? Thoughts?

Same problem here with a MacBook Pro 14" M1 Pro 2021 and Sabrent USB C KVM Switch with dual HDMI outputs.

It was working well before the last update, but now when I switch from a Windows laptop to Mac it doesn't recognize the mouse or keyboard. I have it in clamshell mode and I need to open it an close it again to be able to work on it. I'm thinking on going back to the previous Mac OS version, this is pretty annoying.