Apple, in Mac OS X Lion, provides a new tool for file sharing, AirDrop. The idea is attractive: this system integrated into the Finder allows to share files quickly between two users. The operation is simple: clicking on AirDrop, the list of people nearby appears and simply drag a file so that it is transmitted. A "pop-up" appears on the host machine to accept the file, and the transfer occurs.
Under this simple appearance, AirDrop is technically quite interesting: it is a direct link is created between two computers that share data. Binding is done in Wi - Fi 802 .11n ready in the 5 GHz band for high flow rates (450 Mbps on recent machines) and data are therefore not through conventional network, the binding is dedicated. Operation is close to that proposed the Wi - Fi Direct or Bluetooth 3.0 standard, but Apple here uses Hello and the possible cache operation internal technology.
The main problem is that to work, AirDrop a Wi - Fi card needs - some Apple machines are not equipped with - compatible 802 .11n ready and able to work in "dual band". This last point is the most embarrassing: all cards are not able to work on two bands simultaneously. Specifically, Apple uses three cards 802 .11n ready in his cards: from Atheros, Broadcom of type 432 x and of type Broadcom 943 x. And only the latter are compatible.
Hackintosh lovers, it will therefore be difficult to take in charge AirDrop: the majority of the maps of the market are of Broadcom 432 x. And for users of machines Apple, only output machines since end of 2008 (and again, not all) will be compatible.
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