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    iMac > Netgear DG834GT Woes

    This is a discussion on iMac > Netgear DG834GT Woes within the Sky Router forums, part of the Sky Broadband help category; Hi Guys, I've unpacked and installed my 27.5" iMac yesterday evening. Noticed that YouTube was slow, as was downloading Skype, ...

    1. #1
      bigdavemc's Avatar
      bigdavemc is offline Sky User Member
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      Exclamation iMac > Netgear DG834GT Woes

      Hi Guys,

      I've unpacked and installed my 27.5" iMac yesterday evening. Noticed that YouTube was slow, as was downloading Skype, Chrome etc. Wife complained that the internet for her computer appeared not to be available whilst I was trying to download on the iMac.

      Performing tests to the same server at Speedtest.net - The Global Broadband Speed Test reveals the following, all sat at the same desk and all within 2 or 3 minutes of each other:

      o - Brand new iMac 27.5 i7 processor 12GB RAM but download rates of 0.56Mb/s (my upload is faster at 0.92Mb/s!)
      o - iPhone 4 yields 9.71Mb/s (via Speedtest.net iPhone App)
      o - Sony Vaio SZ1/Windows XP returns 8.98Mb/s

      Remember, these are all from the same desk in the room directly above where the router is. The router is a Netgear DG834GT and Sky are my ISP. My downstream connection speed is reported as 14,328kbps. It is running in 'g only' mode (tried with b+g too).

      In summary, the only device with the issue here is the Mac.

      I called Apple Customer Care this morning and worked with two guys there to isolate where the problem is.

      After resetting many of the iMac/OSX settings and then sharing files between my iMac and another Mac on the same network (over Wi-Fi) we were still witnessing slow throughput (but files shared between other machines were fine).

      The support guy then asked me to try using another Mac (a MacBook) to connect directly to the router using an Ethernet cable, and then to configure internet connection sharing (essentially, configuring the MacBook to be a Wireless Access Point). Now, when I associate my iMac to the MacBook wireless network rather than the router's wireless network, I get perfect download speeds (upwards of 11Mb/s).

      This breakthrough indicates an incompatibility between the iMac's Wi-Fi adapter and the Sky/Netgear router. Apple said they were unable to help from this point on as they'd proven that the iMac's Wi-Fi adapter wasn't at fault.

      Incidentally, I've also installed Windows 7 (x64) via Bootcamp onto the same iMac but achieve the same speeds, even after a driver update. The Wi-Fi adapter shows in Windows as an Atheros AR928X device. I'm going to do some more research to see what else I can find.

      There's very little in the way of configuration that I can do on the Netgear Router (I've tried with and without encryption, changed channel), so I'm at a loss as to where I can go next.

      Has anybody any further suggestions: should I flash some new software onto the router (it still has the default with which it shipped, V1.03.87) or look into procuring a new one (either through Sky directly, or from PC World and find the username/password)?

      Many thanks for your time guys,

      _____________
      David Mc
      London, UK


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    3. #2
      IWasNotTheEnemy's Avatar
      IWasNotTheEnemy is offline Sky User Member
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      Re: iMac > Netgear DG834GT Woes

      See post in your other thread (best to stick to one thread to avoid confusion)
      -------------------------------------------



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    4. #3
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      Re: iMac > Netgear DG834GT Woes

      This breakthrough indicates an incompatibility between the iMac's Wi-Fi adapter and the Sky/Netgear router. Apple said they were unable to help from this point on as they'd proven that the iMac's Wi-Fi adapter wasn't at fault.
      That is not quite correct, is it. All your other devices connect to the router with no problem but the new Mac can't? That suggests the problem is with the Mac and not the router. Of course Apple support could never admit this.

      In previous cases like this the problem has been solved by using a USB adapter, not ideal, but a solution.

      Have you tried changing the channel on the Sky router? This may do the trick.

      You can of course, flash the router to standard firmware, which may make no difference, or use another router which again may make no difference. Both of these are against Sky's T & Cs, it is up to you whether you want to break them.

      Another solution, which may be the best with a fixed device, is to use a Homeplug network. This will give you almost ethernet speed over your power circuit. Homeplug | Broadbandbuyer.co.uk

      Wireless is never 100% dependable for speed or stability.

      TomD


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.


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    5. #4
      bigdavemc's Avatar
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      Re: iMac > Netgear DG834GT Woes

      Thanks Tom - I've confused matters by posting this query twice - here it is in the Sky Mac forum, rather than in the Sky Router forum (which I thought might be a better location - as you allude to, it may be a Mac issue rather than a router issue).

      iMac + Netgear DG834GT = very slow

    6. #5
      bigdavemc's Avatar
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      Re: iMac > Netgear DG834GT Woes

      hanks for your response.

      So, just to prove the point, I've now disabled the wireless on my iMac and connected it via Ethernet and I'm getting an impressive 12.14Mb/s download and 0.96Mb/s up - as it should be.

      Changing channel from 6 to 11 didn't make any difference at all.

      (in fact, the Ethernet connection is to a laptop with Internet Connection Sharing enabled using its wireless adapter to connect to the Netgear router - kinda reinforces the point even more).

      I'm out of thoughts on how to proceed with this - there's no further tinkering I can do with the iMac's Wi-Fi adapter and we've proven that it works just fine when talking to another device, just not to the Netgear router.

      Cheers,
      ____________
      David Mc
      London, UK

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      Re: iMac > Netgear DG834GT Woes

      If you are set on using wireless, you could buy a wireless N router and piggyback it on to the Sky one. The problem with this is unless you use an Apple recommended one there is no guarantee that it will work with your new Mac.

      I would still recommend Homeplugs.

      TomD


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.





    8. #7
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      Re: iMac > Netgear DG834GT Woes

      Had the same issue trying to get an iMac to connect to a Draytek router...just wouldn't have it. Ethernet was fine, though
      -------------------------------------------



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      Re: iMac > Netgear DG834GT Woes

      my mac did the same all i did was change the wirless security toMixed WPA-PSK+WPA2-PSK and changed the mode to 130 mbps from 270 and now it works fine

    10. #9
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      Re: iMac > Netgear DG834GT Woes

      If you mean you changed the mode on the Mac, that probably explains it. The Mac with wireless N is not truly backwards compatible with G. I would not expect Mac support to admit that about their infallible device.

      TomD


      Please note the views and recommendations in my posts are my own and in no way reflect the views of SkyUser.


      Useful Utilites

      http://www.nirsoft.net/utils/wifi_information_view.html/ TCPOptimiser /Test Socket

      Note - When downloading always select the Custom install or you will end up with stuff you don't want.





    11. #10
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      Re: iMac > Netgear DG834GT Woes

      Quote Originally Posted by Isitme View Post
      If you are set on using wireless, you could buy a wireless N router and piggyback it on to the Sky one. The problem with this is unless you use an Apple recommended one there is no guarantee that it will work with your new Mac.

      I would still recommend Homeplugs.

      This is exactly what I did, plugged Airport into the Sky router and used it as an N wifi, works a treat

      Sky wifi is still active as a G service to allow my old windows laptop and DSi access to the big outside world.

     

     

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