AirDrop is a dead-simple OS X service for beaming files back and forth between Macs wirelessly, but a simple terminal command can make it even better.
Simply enter to following command into Terminal:
defaults write com.apple.NetworkBrowser BrowseAllInterfaces 1
Then, restart Finder by typing "killall Finder."
This command will enable Airdrop file sharing over faster ethernet connections, and unlock the feature on "unsupported" Macs and Hackintosh builds. If you're attempting this trick with an older Mac, note that both machines in an AirDrop session, even if one is officially supported, will need to use this Terminal command in order to see each other.
Enable AirDrop on Older Macs and over Ethernet | One Thing Well