Note: The software license for the 802.11n Enabler software allows you to install and use it on all computers under your ownership or control.
I don't think they could care less about who gets this and how. At any rate, it's worth $2.
The updater will enable the n standard on your Airport card if you have one of the following:
- MacBook Pro with Core 2 Duo
- MacBook with Core 2 Duo
- Mac Pro
- iMac with Core 2 Duo (not the 17-inch 1.83GHz model though)
Do not pay for this update if you have the n ability already enabled (this would be on very new Mac's, the download page tells you how to check), or if you plan on buying the new Airport Extreme which has the enabler included.