Enter the six-digit code appearing on your device's screen into the app or service you're setting 2FA with as confirmation. You will then be asked to confirm that the authentication system has worked.You’ll need to choose a name for the server, and you’ll be asked to enter your Apple ID and password to use certain services. When you’ve downloaded it to your old Mac, launch the app and follow its instructions. Make sure to select whether it is Time-based or Counter-based if the account system advises as such, otherwise leave it to Time-based. Download and Install OS X Server Start by purchasing the OS X Server app from the Mac App Store. If a key is offered, enter in the account name (usually the relevant email address) and the key provided to you on-screen.If a QR code is presented to you in the site or app you're setting up 2FA for, select Scan a QR Code, then use your device's camera to scan the code.Otherwise, select the plus symbol in the bottom-right of the screen. If this is your first addition to the app, you will be asked how you want to add the code directly.Once presented with either a QR code or an authenticator key, open Google Authenticator on your iPhone or iPad.You may be recommended to use specific authenticator app, so check that Google Authenticator is on that list. When asked, you should select to use an authenticator app.This could be an option in account settings under a section marked 'security' and an option offering to 'set up two-factor authentication,' for example, but this will vary between services. Sign into whatever service you want to enable 2FA for, and attempt to set it up.Download Google Authenticator from the App Store to your device.

How to setup apple mac server os x