Continue working on one device where you left off on another. You can use Handoff with many Apple apps—for example, Mail, Safari, Pages, Numbers, Keynote, Maps, Messages, Reminders, Calendar, and Contacts—and even some third-party apps. To use Handoff, you must be signed in to iCloud using the same Apple ID on all your devices. Your devices must have Bluetooth on and be within Bluetooth range of one another (about 33 feet or 10 meters).
Switch devices.
From Mac to iPod touch: The Handoff icon of the app you’re using on your Mac appears on iPod touch in the bottom-left corner of the Lock screen. Swipe up to continue working in the app. Or, double-click the Home button on iPod touch to see the app switcher, then tap the app.
From iPod touch to Mac: The Handoff icon of the app you’re using on iPod touch appears on your Mac at the left end of the Dock (or the top, depending on the Dock position). Click the icon to continue working in the app.
Disable Handoff on your devices.
iOS devices: Go to Settings > General > Handoff.
Mac: Choose Apple Menu > System Preferences > General, then turn off “Allow Handoff between this Mac and your iCloud devices.”