Do I Have Wireless N on the MacBook Pro?

Wireless-N is the current wireless networking standard as of 2011.

The MacBook Pro, a laptop computer manufactured by Apple has always featured built-in wireless capability. The internal wireless card installed in all versions of the MacBook Pro is an AirPort card, Apple's proprietary brand of wireless cards. The version of AirPort card that comes in MacBook Pro models is the AirPort Extreme Card.

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What is Wireless-N?
- Wireless-N is one of the protocols of the wireless 802.11 standard developed by The Wi-Fi Alliance. As of 2011, it is the current protocol; A, B and G are protocols that were developed previously and are still in use. The Wireless-N standard was adopted in 2007, so any pre-2007 MacBook Pro computers feature Wireless-G, not Wireless-N.
Wireless-G MacBook Pro Models
- A wireless card is integrated in every MacBook Pro model.
  
  Whether or not you have Wireless-N depends on which version of MacBook Pro you own. The initial MacBook Pro released in early 2006 was the 15" Core Duo model, which included a processor of either 1.83GHz, 2.0GHz or 2.16GHz. The 17" MacBook Pro with a 2.33 GHZ Core 2 Duo processor, released in late 2006, was the final version of that computer to feature Wireless-G.
The Santa Rosa
- Your Wireless-N MacBook Pro is backwards compatible with Wireless-B and Wireless-G routers.
  
  In June 2007, Apple released its first MacBook Pro with Wireless-N capability. The 17-inch model, nicknamed Santa Rosa, featured a 2.4GHz Intel Core 2 Duo processor as well as the option for a higher resolution screen. All subsequent models have Wireless-N AirPort cards installed.
How To Check Your Wireless Card
- By selecting "About This Mac" under the apple in the upper-left corner of the screen, you can find out what version of wireless card you have. Click on "More Info" and then select "Wi-Fi" from under "Network" in the column on the left. If "N" is listed as one of the "Supported PHY Models," then your MacBook has Wireless-N. Note that in Lion (OS X.7), you must take one extra step; you have to click on "System Report" after "More Info" to see this information.