1. Go to Finder and choose "Go" in the menu bar.
2. Choose "AirDrop" on the left side of the window.
3. Turn on Wi-Fi and Bluetooth on your Mac if you haven't turned them on.
4. You can set the "Allow me to be discovered by" option as "Everyone" or "Contacts Only".
5. After you have turned on AirDrop on Mac, drag the items you want to share to the recipient's image appeared in the AirDrop window and click "Send". (Or you can choose items, tap on the Share button, choose "AirDrop", select the recipient and click "Done" to transfer data to another AirDrop-supported device.)