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To help identify several common issues with YubiKeys, you can follow the instructions below.
- Plug the YubiKey in and confirm the LED turns on. If not, try flipping it over as some USB ports are "upside down".
- Check to see how your YubiKey is being identified.
- Windows users check Devices and Printers in the Control Panel.
- MacOS users check Apple Menu > About This Mac > System Report, and look under Hardware > USB.
- Linux users check dmesg in Terminal.
- Make sure the YubiKey shows up as "YubiKey OTP+FIDO+CCID" or similar, depending on the model of YubiKey.
- If you are missing one of the USB Interfaces (OTP, U2F/FIDO, or CCID) you can use the Enabling or Disabling USB Interfaces article to enable it.
- Test U2F by following the Testing U2F guide.
- Test OTP by following the Testing Yubico OTP guide.
If these steps don't resolve your issue, consider opening a support ticket here.
Note: YubiKeys use capacitive touch sensors, so if your skin is dry, it will be harder for a touch to be detected. Lotion may help this, and you can also try applying more pressure to make sure your finger covers more of the sensor.