That means that the device parameters need to be tweaked inside the kext, especially if it works fine under windoze with all 13 channels, This would be intresting to see, I would like to get more than 11 channels too.

00010

Wouldn't it be easier to just change the channel your router/access point broadcasts on?

No. I want to join University Infrastructure at channel 13, in World is know as "Eduroam" network.

i just got me a new wireless n" card today and it works out of the box! TP-Link TL-WN951N and can join channel 12,13 so maybe you need a new card?

I am a pc user too, I have laptop dell d630 and I tried this card on windows xp and windows 7 too, everything wokring well with channel 1-13, but only under Mac OSX it does with channel 1-11 only

Now, I am gonna to buy other wifi kard with chip Broadcom BCM4321 with 802.11n draft support, my question is: Will this new card supported by Max OSX ? (I have Snow Leo 10.6.2).

THANKS!

Now, I have BCM4321 802.11a/b/g/n and still have problems with supporting channels 12, 13.
Now my card supports channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165, but 12 and 13 is not included.

This is from System profiler... AirPort:
Software Versions:
Menu Extra: 6.2 (620.24)
configd plug-in: 6.2 (620.15.1)
System Profiler: 6.0 (600.9)
Network Preference: 6.2 (620.24)
AirPort Utility: 5.4.2 (542.23)
IO80211 Family: 3.1 (310.6)
Interfaces:
en1:
Card Type: Third-Party Wireless Card
Supported PHY Modes: 802.11 a/b/g/n
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165
Wake On Wireless: Supported
Current Network Information:
Security: None
Other Local Wireless Networks:

Using application named WiFi Scanner I see, that my Country Code is set to US and I dont know, how to change it.

Please help.