Handoff

Start a task on one device, pick it up on another.

How to Enable

Sign in with the same Apple Account on all devices
Turn on Bluetooth and Wi-Fi on both devices
System Settings > General > AirDrop & Handoff > turn on Allow Handoff between this Mac and your iCloud devices

How It Works

Writing an email on your iPhone? An Mail icon appears in your Mac's Dock: click it to continue there
Browsing a webpage on your Mac? A Safari icon appears on your iPhone's lock screen
Works with Mail, Safari, Notes, Reminders, Maps, Calendar, Contacts, Pages, Numbers, Keynote, and many third-party apps