Sorry, the statement in this article about the Apple 802.11n update being free is incorrect, the update in fact costs $1.99 and can be purchased and installed on Core 2 Duo based Macs here:
After first saying they’ll charge $4.99 for the 802.11n update to Core 2 Duo MacBook and MacBook Pros and then changing that to $1.99 it is now the best price you can get — FREE! The firmware download patch is available today.
The update comes in the form of firmware update 2007-001 and is recommended for all Intel Macs, the download link is here:
Apple 802.11n Extreme Wireless Router (802.11n)
An article in the Wall Street Journal this week called out the fact that Apple didn’t really have to charge for the update if they didn’t want to (per "expert" accountant opinions) and it seems Apple now agrees with this take. Good news for consumers! Now all you need is the $179.99 to buy the 802.11n Apple Extreme router so you can benefit from this 802.11n firmware update. But of course any 802.11n router will work, it doesn’t have to be Apple branded, so get your 802.11n router shopping on and just think of the fact you saved $4.99 towards the cost of that already — kind of.
The 802.11n Apple Extreme Wireless Base Station can now be ordered from Apple.com for $179.99 and will start shipping in February.