Can't connect to 5 GHz wireless N network

I'm having the "5GHz wifi cannot connect" problem.

My 2011 MacBook Pro shows country code JP and 5GHz channels 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140.

My ISP supplied router allows only channels 149 153 157 and 161 and is locked.

There are no other wifi signals at this location. I thought the MBP would adjust its country code and available channels based on router broadcast but this seems not to be happening. There is no identifier in the country code portion of the wifi scan table.

How can I force the MBP to switch to my available 5Ghz channels?

Thanks

In case it helps anyone, in my case Mac was able to connect to the 5GHz access point, but with an extremely high latency e.g. ~1,000 ms pinging the home router, networking would practically be useless. I have followed the instructions outlined in the answers before me and my Mac WiFi supported channels were inline with the router settings. Through trial and error I have found a higher channel on two access points to resolve the high latency ping issue and networking resumed as expected using both access points.

The solution I just found is to go to About This Mac -> More Info -> System Report -> Network -> Wi-Fi. Under Interfaces, look for supported channels. I had to go into my router settings and make sure I was on a compatible channel. The second I did that, my 5 ghz network showed up and is working perfectly!

I just installed a new Airport Extreme. My Macbook Air and iPad can both see the 5Ghz network, but my late-2009 iMac cannot. Looking in About This Mac>System Report>Network>Wi-Fi, the 5Ghz channels do not show up as supported channels.

I've seen this issue reported in numerous threads for numerous iMac models, but so far I have not found a reason for this issue or a fix/workaround. Anyone else?

Since we have a buch of Macs at home, I was able to figure which frequency was best for all of them. Channel 48 did the trick for a MacBook Pro 2010 and a 2010 iMac! 🙂 Ty for the tip

802.11d was my problem

My issue was that I had to change the 5GHz SSID on my Wi-Fi router to a channel that worked in all regulatory domains. Due to the large number of misconfigured wireless networks near me when I would wake up my MacBook Pro, 802.11d would kick in and turn off some of the wireless channels on the Wi-Fi card appearing to render my 5GHz network invisible. Once I did that it's been rock solid.

More details here:http://jeff-with-a-g.blogspot.com.au/2012/04/5ghz-wifi-on-your-mac-got-you-down. html

Thank you for this, it solved my issues with my iMac.

Thank you justathome!! worked perfectly 🙂

ARTTUK : Here is best solution. I have similar router Linkys EA2700 and until today the same problem - MBA not see 5 GHz site . Solution is trivial - In router you must write SSID - name ,OTHER for 5GHz frequency , than for 2,4 GHz . For example "site1" for 2,4 GHz and "site2" for 5 GHz. Passport can be the same. My MBA after this will see both this sites . You will chooce "site2" for 5 GHz and this is all. In my MBA now is wifi on 5GHz average 140 Mbps and on 2,4 GHz 40 Mbps. 🙂

Was very happy to find this post, and have tried all the suggestions above but my Macbook Air still does not connect to the 5 GHz network.

Our base station is Asus RTN56U. We tried putting the 5GHz on channels 36 and 48, no security, but my Air won't see it. Tried killing 2.4GHz just for fun. Still didn't see the 5GHz network. My husband's Thinkpad/Ubuntu sees it, of course.

Any ideas? My system report on network below

Thanks!!

en0:

Card Type: AirPort Extreme (0x14E4, 0xE9)

Firmware Version: Broadcom BCM43xx 1.0 (5.106.98.100.15)

Locale: FCC

Country Code: US

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, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165

Wake On Wireless: Supported

AirDrop: Supported

Status: Connected

Thank you so much, after over a year having trouble with finding the 5 gHz network (My mac found it 10 % of the time, and my windows-partition found it 100% of the time), It´s stable. But I´m not shure If I should laugh or cry over the fact that I just had to change the name of the network...;)

Castroneves, wauw thanks for the solution! I've been playing around for days but setting it to channel 48 did the trick! Thanks 😀

Fantastic post, the information contained in the link completely resolved the issues I was having with Wifi with my Macbook Pro.

The 5 ghz band channels are 149,153, 157 and 161