Hi there,
From what we can tell, when you attempt to sign in to FaceTime on your MacBook Air, you're seeing an error alert that says "This account has no reachable addresses. Please sign into appleid.apple.com in order to add one.” We’re glad you’ve joined us in Apple Support Communities, and we’d be happy to provide some guidance.
We'd like to begin by clarifying that the address the alert is referring to is an email address, not your home address. You’ll want to start by signing in to your Apple ID account page as directed, then confirm if you have an email address listed in the ‘Reachable at’ section. If not, follow these steps to add one:
About your Apple ID email addresses
“Add an additional email address
- Sign in to your Apple ID account page.
- Click Edit in the Account section.
- Under Reachable at, select Add More.
- Enter your additional email address. Make sure you're not already using it as an Apple ID.
- We'll send a verification to that address. Didn't get the email?
- Enter the verification code and click Verify.”
If you’re still having trouble signing in to FaceTime afterwards, work through the steps in this support article:
If you can't sign in to your iMessage account or FaceTime on your Mac
We hope this information is helpful. Don’t hesitate to let us know if you have any more questions.
Take care.