MacBook Air :: 2012 11" Slow On 5Ghz Airport Extreme Wifi Network?

Jun 29, 2012

I'm encountering an issue with a new Macbook Air and would grateful for any insights. I have an Airport Extreme (latest model, 5th gen, A1408) based network (all updates applied). I have a new 2012 MacBook Air (11") that I noticed was suffering from VERY slow wifi speeds. After looking into it, I realized that if I used the configuration utility to separately name the 5GHz network and connect to wifi on the 2.4 Ghz network, the speed radically improved. 

To illustrate, using, I saw download speeds of 35-38 Mb/s using the 2.4 Ghz network. This drops to 2-3 Mb/s when using the 5 Ghz network. The Macbook Air is showing an RSSI value of -56 when connected via 5 GHz and -51 when connected via 2.4 Ghz. 

Other deivces in the home have normal connection speeds on the 5 GHz network, as does a previous generation, 2011 MacBook Air.A friend's also new, 2012  11" MacBook Air exhibits the same symptoms, so the issue is not specific to my unit. 

MacBook Air, Mac OS X (10.7.4)


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Dec 9, 2008

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I can connect to my NAS or other network shares, but they are very, very slow.

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Sep 4, 2007

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I'm experiencing very slow speeds on my new Macbook Air 13" mid 2012. For example when I'm transferring files from my NAS, a Qnap TS-259 Pro+, wirelessly through my D-Link DIR 855 router. I barely reach speeds around 1MB/s. If I use my Windows 7 laptop, that sits right next to my Mac, to transfer the exact same file I get constant speeds around 6MB/s. That's six times faster. 

Is there a known issue with the wifi that I've missed? 

I did some further testing to try and identify the cause of the wifi problem. I installed Windows 7 in Parallels and transferred the exact the same files once again. Here's where it becomes interesting. Transferring those same files on my Macbook, using Windows 7 under Parallels, the speed was the same as it was on my physical Windows 7 machine, i.e. a constant speed of around 6MB/s. I then switched back to Mac OSX again and the speed once again decreased to around 1MB/s.

MacBook Air, Mac OS X (10.7.4)

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Jul 4, 2012

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Feb 23, 2010

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Apr 25, 2010

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My problem is, that it does not seem like me Airport Express does a good job of forwarding my 2 USB Airport Disks to the extended wireless network upstairs.

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Jul 22, 2009

I just purchased my first Mac: 13" macbookpro. I got a time capsule with it as well, but cannot set up my macbook to connect to the internet. I connected my desktop pc with windows XP via ethernet just fine. But I cannot get the wireless network to popup on my airport extreme.

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Jul 8, 2009

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Jun 7, 2012

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Apr 21, 2010

I have a slow network issue. I'll try to make it as simple as possible.

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Jan 12, 2010

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MacBook Air, Mac OS X (10.7.3)

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Nov 12, 2009

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setting mbp: 2.4 GHz / 802.11n
setting imac: 2.4 GHz / 802.11n
=> copy from mbp to imac: 2:02 minutes

setting mbp: 5.0 GHz / 802.11n
setting imac: 5.0 GHz / 802.11n
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Sep 15, 2009

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Jan 25, 2008

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Feb 15, 2009

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