How to update the firmware?
Note: If everything works fine with your keyboard. Please don’t update the firmware. There is a chance it can damage your keyboard.
This K3 firmware can be used for both the K3 version 1 and version 2.
Please follow the instructions correctly to flash the firmware.
Download the correct firmware for your layout (K3 White Backlight/ K3 RGB Backlight/Gateron switch/ Keychron optical switch) otherwise, it can break your keyboard.
Make sure you have switched the keyboard to cable mode. If you flash the keyboard in Bluetooth mode, it will brick your keyboard.
Make sure you have switched the system toggle correctly. ( Means you need to switch the keyboard to Windows if you are using a Windows, you need to switch the keyboard to the Mac if you are using a Mac)
Make sure that your keyboard is connected to the PC/Mac through the cable that comes with the box ( if you are using a third-party cable, please make sure the cable can pass data as some of the cables can only be used for charging).
Make sure that you use only the Keychron keyboard to connect with the PC, otherwise, it might flash the firmware of your other keyboards. If you have multiple Keychron keyboards, please zip the firmware one by one, do not plug all the keyboards into the computer altogether.
Now start running the exe file for Windows or the app file for the Mac. On Mac if you meet the problem of “App is damaged and can’t be opened. You should move it to the Trash. ” Please follow the instruction under this page to fix it.
After flashing the new firmware, hold "Fn"+"Z"+"J" these three keys together for five seconds to do the factory reset. Then you are good to go.
Download the Firmware from the following link:
(ATTENTION!: All the firmware below is original factory firmware. If your keyboard works fine then please don't try the firmware, otherwise, it will destroy your keyboard.)
If you meet the problem of “App is damaged and can’t be opened. You should move it to the Trash. ” Here are two ways to to fix it.
1.Download the GateKeeper_Helper.(you can refer to this link and download it.) Completed download and open it. Then open the “GateKeeper_Helper”.
2.You will see five options and ask you enter your choice, now you type 3 and enter, it will show you that “Drag & Drop The App Here Then Hit Return: “, please drop the firmware to the GateKeeper and hit Return and then input your password and click enter, now you will see the [Process completed], done!
Finally, please try to open our firmware again and you should be able to process the firmware update now, thank you.
1. Unzip the firmware and move the unzipped firmware to the "Downloads" folder.
2. Open "Terminal" and enter the code below, then enter the password.
sudo xattr -dr com.apple.quarantine ~/Downloads/FIRMWARE FULL NAME.app
eg: for the firmware I downloaded named "K2-V2-84K-white-US-V1.04", I need to enter "sudo xattr -dr com.apple.quarantine ~/Downloads/K2-V2-84K-white-US-V1.04.app"
3. Try to open the firmware again and you should be able to process the firmware update now, thank you.
Windows Firmware release date: 01/27/2021