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On an iOS device, tap Settings > Bluetooth and turn on Bluetooth. On your Mac, go to System Preferences > Bluetooth and click the Turn Bluetooth On button. You can also select the Show Wi-Fi Status in Menu Bar box, near the bottom of the pane, to be able to turn Wi-Fi off and on from the menu bar. ② To make sure Wi-Fi is on, go to the Network system preference pane and click Wi-Fi at the left. On an iOS device, tap Settings > Wi-Fi and turn on Wi-Fi. On your Mac, go to System Preferences > Network, click Wi-Fi, and click Turn Wi-Fi On ②. (They don’t have to be on the same network.)
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① If you have a Yosemite or El Capitan Mac and an iOS 8.1 or later device that both meet Apple’s hardware requirements, you can use AirDrop sharing between them.
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Now-a-days we have options like the Messages app, email, and Dropbox, as well as Apple’s AirDrop ①. Once upon a time, moving electronic files from one computer to another required cables, know-how, and fair dose of determination.
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