# Troubleshooting passkey errors

If you're experiencing issues with a passkey while using a supportable device and operating system, this may be due to one of the following reasons:
### General supportability
Not all devices and web browsers support passkeys today, and you'll only see the option to add a passkey when it's supportable. You can find a list of the devices and operating systems that are currently compatible with passkeys [here](https://webauthn.me/browser-support).
### For iOS or Mac
**iCloud password sharing is disabled (when using Safari)**
If you're using an Apple device (iOS or mac) and using Safari as your browser, you must have iCloud keychain enabled before being able to use the device with passkeys. First, follow [these steps to set up your iCloud keychain](https://support.apple.com/guide/ipad/passkeys-passwords-devices-ipada39a7fa0/ipados#:~:text=If%20you%20didn%27t%20turn,then%20follow%20the%20onscreen%20instructions), then refresh the page to try again.
**iOS 16 or above required**
To use passkey on an iOS device, you’ll need to have the latest iOS version (iOS 16 or above) installed. Learn more about [passkey’s compatibility with Apple’s operating system](https://support.apple.com/guide/ipad/passkeys-passwords-devices-ipada39a7fa0/ipados#:~:text=If%20you%20didn%27t%20turn,then%20follow%20the%20onscreen%20instructions).
### For Windows
**Windows Hello not enabled**\
If you are using a Windows device, you’ll need to have Windows Hello set up in order to use passkeys. Learn more about [Windows Hello and how to set it up](https://support.microsoft.com/en-us/windows/learn-about-windows-hello-and-set-it-up-dae28983-8242-bb2a-d3d1-87c9d265a5f0).
### Other common issues
**Passkey already exists**
You can only have 1 passkey per device and account. From your device settings, check whether a passkey already exists. If there is one, you will have to use the existing passkey to log in. Alternatively, use a different device in order to add a new passkey.
**Passkey has been removed from Link**
Once a passkey has been deleted from your Link account, it can no longer be used. Attempting to log in using a passkey that is still on the device but has already been removed from Link will lead to an error. You’ll need to first re-add the passkey to your Link account in order to use it to log in.
**I’m seeing a QR code**
A passkey is tied to a specific account and platform (ex: the device or a key sharing mechanism like iCloud keychain). If you see a QR code when attempting to log in using a passkey, this means that you do not yet have a passkey on the current device/platform that you are using (but may have had one set up on a different one previously). If the device you previously made a passkey on has a camera, you may be able to scan the QR code to login using that existing passkey. Otherwise, use the SMS or email verification code option to log in. Once logged in, you can then set up an additional passkey for the new/current device you’re using.
If none of these troubleshooting steps work, or if the error you’re experiencing persists, use the SMS or email verification code option to log in to your Link account.