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Problems with 5GHz wi-fi on iMac 27" late 2012

Hi,


I have a dual band router Netgear R6300 and the new iMac. iMac has a problem seeing the 5GHz band and automatically connects to the 2.4GHz band all the time. It really drives me crazy. Apple support did not help at all and they don't know what they are doing.


First, it started losing the 5GHz bank after falling to sleep but I know I simply cannot find the bloody 5GHZ bank although my iPad and iPhone 5 see it just fine.


Does anyone experience this problem and have a solution?


Thanks.

iMac, OS X Mountain Lion (10.8.3)

Posted on May 8, 2013 11:13 AM

Reply
5 replies

May 27, 2013 1:16 PM in response to rkaufmann87

I have also just experience this issue after doing an update to my imac. I used to connect to the 5ghz channel 44 however it seems since i have done the update this internal card doesn't seem to support this channel anymore. On my d6300 modem the 5ghz only has channels 36 to 48 avaliable.

It certainly was Apples doing here as it was totally fine for 5 months on channel 46.

May 29, 2013 10:51 AM in response to grahamqaz

I can report that the issue was resolved by Apple support. It took me two hours on the phone with 3 people all the way to a senior engineer. They didn't explain why airport showed different ranges of supported channels for 5Ghz band. They assumed the configuration files (s) got corrupted so the engineer had me pull a System Configuration folder on the desktop and restart. Ever since then my connection to 5Ghz has been stable and reliable. I still keep the folder on my desktop in case things go wrong by the time my phone support period expires.


But luckily so far so good.


Thank you, Apple

Problems with 5GHz wi-fi on iMac 27" late 2012

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