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).
However there is a way around this (kind of*). Meaning you have to tinker with the Terminal first. Just type the following into the Terminal: defaults write com.apple.NetworkBrowser BrowseAllInterfaces 1 (that’s it!) Now non supported Macs will know how to “AirDrop” files *as long as the Macs are in the same network. Thanks, Mac OS X Hints! To find out which WiFi cards support AirDrop check out this web site.