Hola Koothrappali, date una vuelta por los productos de quickertek.com, todos los USB Network Adapter son compatibles con Mac OS X de 10.4 hasta Lion al salir de la caja. 100% compatibles
Esta antena podría ser lo que necesitas y envian a España
Compatible with 10.7 Lion!
Simply install software using the 10.6 drivers.
If you have upgraded to Lion and already have a Quicky Jr II, just uninstall and reinstall the 10.6 driver.
QuickerTek's Junior II USB is the fast and easy answer to improving your wireless range and speed for any Apple MacBook, MacBook Pro or MacBook Air. In fact any Mac running 10.4.x or newer and has an open USB port can use the Junior II.
It uses an easy-to-install USB driver and simply plugs via the USB port. No extra steps, nothing to memorize, and no extra hardware. It's small size makes it easy to pack in your travel bag. The Junior II also comes with a bendy USB adapter that you can use, or you can plug it directly into the USB port.
This network adapter supports the standard wireless encryption 64/128 bit WEP and WPA. That means you don't sacrifice privacy for speed. There are no "gotchas" with this one. Just load the software package, plug it in, and go.
Junior II USB works with common wireless hardware:
802.11n, 802.11b, 802.11g, and, of course, Apple AirPort Extreme Base Stations