If set to receive from Contacts Only, both devices must be signed in to iCloud, and the email address or phone number associated with the sender's Apple ID must be in the Contacts app of the receiving device. iPhone, iPad, and iPod touch have a similar setting. Choose Go > AirDrop from the menu bar in the Finder, then check the ”Allow me to be discovered by” setting in the AirDrop window.Make sure that your devices can receive AirDrop requests:
To find out, choose Apple menu > About This Mac. Make sure that your devices meet these requirements: