AirDrop is the extremely easy local peer-to-peer file transfer tool that is built into Mac OS X 10.7 alas according to apple only the more recent Macs support it: MacBook Pro (Late 2008 or newer)*, MacBook Air (Late 2010 or newer), MacBook (Late 2008 or newer)*, iMac (Early 2009 or newer), Mac Mini (Mid 2010 or newer), Mac Pro (Early 2009 with AirPort Extreme card, or Mid 2010) * The MacBook Pro (17-Inch Late 2008) and the white MacBook (Late 2008) do not support AirDrop.
But this really isn’t the case – you can enable AirDrop with Ethernet and enable AirDrop support on unsupported Macs running OS X 10.7+ by using the following defaults write command in the Terminal:
defaults write com.apple.NetworkBrowser BrowseAllInterfaces 1
Type or paste the above and hit enter. You’ll then need to reboot the finder either with the ‘killall Finder’ command or reboot the Mac for changes to take effect.
The best bit is that this enables AirDrop over both Wi-Fi and wired Ethernet connections, in other words any machine running Lion can use it whether or not it has a wireless card. As long as it’s connected to the same network you will be able to see the Mac in the AirDrop list of another Mac running 10.7.
If you ever want to disable this for some reason, you can just use:
defaults write com.apple.NetworkBrowser BrowseAllInterfaces 0