Use Handoff on your Mac
With Handoff, you can continue on one device where you left off on another. Start a FaceTime call on your iPhone, then transfer the call to your Mac mini when you get back to your desk. Or work on a presentation on your Mac mini, then continue on your iPad. View a message on your Apple Watch, and respond to it on your Mac mini. Handoff works with FaceTime, Safari, Mail, Calendar, Contacts, Maps, Messages, Notes, Reminders, Keynote, Numbers, and Pages.
Note: To use Handoff, you need an iPhone or iPod touch with iOS 8 or later, or an iPad with iPadOS installed. Make sure your Mac mini, iOS device, or iPadOS device have Wi-Fi and Bluetooth turned on and are signed in with the same Apple ID.
Hand off actions between devices. For most activities, when your Mac mini and other devices are near each other, an icon appears in the Dock when that activity can be handed off; click the icon to hand off between your devices.
For FaceTime, no icon appears in the Dock for handoff. Instead, if you want to hand off a call from your iPhone or iPad to your Mac mini, click 
in the menu bar on your Mac, click Switch, then click Join in the FaceTime window on your Mac. To hand off a FaceTime call from your Mac mini to your iPhone or iPad, tap in the upper left of your iPhone or iPad, tap Switch, then tap Switch again.
Turn on Handoff on your Mac mini. Open System Settings, click General in the sidebar, click Airdrop & Handoff, then select “Allow Handoff between this Mac and your iCloud devices.”
Turn on Handoff on your iOS or iPadOS device. Go to Settings > General > Handoff, then tap to turn on Handoff. If you don’t see the option, your device doesn’t support Handoff.
Turn on Handoff on your Apple Watch. In the Apple Watch app on iPhone, go to Settings > General, then tap to turn on Enable Handoff.
Handoff works with FaceTime, Safari, Mail, Calendar, Contacts, Maps, Messages, Notes, Reminders, Keynote, Numbers, and Pages.
Learn more. See Pick up where you left off with Handoff in the macOS User Guide.