What is this "Sharingd"?
NAME: sharingd -- Sharing Daemon that enables AirDrop, Shared Computers, and Remote Disc in the Finder.
SYNOPSIS: sharingd
DESCRIPTION: sharingd is used by the Finder to enable AirDrop file sharing, connecting to shared computers, and accessing Remote Discs from other computers.
FILES: /usr/libexec/sharingd
HISTORY: sharingd first appeared in Mac OS X 10.9.
MacBook Pro with Retina display, OS X Mavericks (10.9.4)