Mac OS X 10.7 Lion’s new AirDrop feature lets you copy files between two Macs without requiring an active Wi-Fi network, or that both machines be on the same network. It’s quick, secure, and nifty — but only if both people have sufficiently new Macs. During Lion beta testing, it was clear that some Lion-capable Macs couldn’t summon the right mojo to use AirDrop, which requires relatively recent Wi-Fi chips.
Apple’s provides the first full accounting of which machines have AirDrop enabled. Here’s the rundown, although you can click over there, too:
The other way to know whether AirDrop works? If it appears as an option in a Finder window’s sidebar under the Favorites list.