FaceTime requirements on Mac
Before you can make or receive FaceTime calls or phone calls on your Mac, see the following requirements.
What you need to make FaceTime calls
To make FaceTime audio and video calls on your Mac (OS X 10.9 or later required), you must:
Be connected to the internet
Have a built-in or connected microphone; for FaceTime video calls, you also need a built-in or connected camera
What others need to receive your FaceTime calls
The person you’re making a FaceTime video or audio call to must be signed in to FaceTime and have any of the following:
A Mac with OS X 10.9.2 or later, and a built-in or connected microphone
An iOS device with iOS 7 or later or an iPadOS device
Important: To make and receive FaceTime calls with multiple people (Group FaceTime), you and the people you’re calling must be using the macOS Mojave 10.14.3 Supplemental Update or later, or iOS 12.1.4 or later, or iPadOS. This feature may not be available in all countries or regions. See Make a Group FaceTime call on Mac and the Apple Support article About the security content of macOS Mojave 10.14.3 Supplemental Update.
What you need to make and receive phone calls on your Mac
To make and receive phone calls on your Mac (OS X 10.9 or later required), make sure of the following:
Your iPhone has iOS 8 or later installed. See the Apple Support article Update your iPhone, iPad or iPod touch.
Your iPhone and Mac are on the same Wi-Fi network and connected to the internet. See Connect your Mac to the internet using Wi-Fi.
Your iPhone and Mac are signed in to iCloud and FaceTime using the same Apple ID. See Set up iCloud, Sign in to or out of FaceTime and the Apple Support article Use Continuity to connect your Mac, iPhone, iPad, iPod touch and Apple Watch.
Your iPhone and Mac have Wi-Fi Calling turned on. Wi-Fi Calling isn’t available on some Mac models. See Set up your iPhone and Mac for phone calls.
If you have hearing or speech difficulties, or want to call someone who does, you can use Real-Time Text (RTT) for your phone calls if your carrier supports it.
Note: To make or receive an RTT call, you must be using macOS Mojave 10.14.2 or later with Wi-Fi Calling through iPhone with iOS 12.1.1 or later. This feature is not available in all countries or regions or supported by all network providers. Depending on your network environment, an RTT call may be downgraded to a textphone call.