The enterprising (and brave) people over at Hardmac have discovered a method of enabling 802.11n support on Core Duo-based MacBooks and MacBook Pros.
The original series MB and MBP shipped with an Airport Extreme card supporting 802.11a, 802.11b and 802.11g, but not the new 802.11n draft spec employed by the new Airport Extreme base station, providing increased range and bandwidth.
Hardmac's method employs the Airport Extreme card available for the Mac Pro (available from here), which features the same bus connection and number of aerial connections (two) as found in the Core Duo Apple laptops. The method is not compatible with the card found Core 2 Duo Macbook and MacBook Pro, which uses three aerial links.
Once installed, 802.11n can be enabled by using Apple's official 802.11n enabler utility.
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