kazky1

Q: Wifi Issues Yosemite 10.10.5

My macbook pro is connecting to a virgin media super hub. The wifi drops out every 20-30 seconds rendering it unusable. Pages take ages to load, if at all, constant time outs. I have to keep changing from 2ghz to 5ghz to try to keep pages loading. I have many other devices using wifi, ipad, iphone, samsung phone and notebook pc, these have no issues with wifi it is purely the macbook pro. I have had the macbook for less than 2 months and it seems to be getting worse.

 

I've tried a few solutions, such as creating a new location, ticking the 'change network' renewing the DHCP lease, removing the account altogether and setting up again. Nothing helps.

  

 

MacBook Pro (15-inch Core 2 Duo), OS X Yosemite (10.10.5)

MacBook Pro (15-inch Core 2 Duo), OS X Yosemite (10.10.5)

Posted on Sep 13, 2015 10:19 AM

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Q: Wifi Issues Yosemite 10.10.5

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  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 13, 2015 10:30 AM in response to kazky1
    Level 9 (61,095 points)
    Desktops
    Sep 13, 2015 10:30 AM in response to kazky1

    Hold down Option while you click on the Wi-Fi Icon on the menuBar. You get a display like this:

    Option-WiFi.png

     

    What do you get for Channel, PHY mode?

    RSSI/signal strength?

    Transmit rate?

     

    and most important, how many other networks do you see?

  • by kazky1,

    kazky1 kazky1 Sep 13, 2015 10:57 AM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Sep 13, 2015 10:57 AM in response to Grant Bennet-Alder

    Screen Shot 2015-09-13 at 18.55.07.png

     

    this is what i get, not sure what anything means

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 13, 2015 12:19 PM in response to kazky1
    Level 9 (61,095 points)
    Desktops
    Sep 13, 2015 12:19 PM in response to kazky1

    You are using the much-less crowded 5GHz band, and have a double-wide 40MHz channel. Your RSSI (signal) to noise is (-95 -56) = -39, a very strong signal. Your Transmit rate bears this out at a remarkable 324 Mbits/sec.

     

    you should be having no problems, Even with all those competing Networks, because most will be fighting for the crowded and interference-prone 5GHz band.

     

    PROVIDED your Router is using Channel selection "automatic" in the 5GHz band. This allows the Router to "sniff" the various Channels at Startup, and choose the one with least interference and the best reception. This is why every debugging procedure includes "cycle the power on your Router" as an early step.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 13, 2015 12:28 PM in response to Grant Bennet-Alder
    Level 9 (61,095 points)
    Desktops
    Sep 13, 2015 12:28 PM in response to Grant Bennet-Alder

    There are some additional tools that you can initiate and leave open in a corner of your desktop. They are available through "Network Diagnostic button when you Option-clcik the Wi-Fi Icon. Let it run through the first part, it probably won't find anything deadly, and let it proceed for about a minute to this screen:

    Screen Shot 2015-09-13 at 3.22.04 PM.png

     

    Now from the Window menu, choose "Performance". a window opens with a real-time graph of the Transmit rate, signal Quality, and the third graph shows both signal and noise in different colors. Don't close any of theses. Just leave the graph in a corner of your desktop and go about your business. ALL of these indicators should stay very close to their present Values. If any "takes a dive" you want to look into it.

     

    Screen Shot 2015-09-13 at 3.26.10 PM.png

     

    .

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 13, 2015 12:31 PM in response to Grant Bennet-Alder
    Level 9 (61,095 points)
    Desktops
    Sep 13, 2015 12:31 PM in response to Grant Bennet-Alder

    Selecting the "Scan" window will give you a better picture of who you are fighting for bandwidth, and what Channel in which band they are currently using.

     

    Use Wireless Diagnostics to help you resolve Wi-Fi issues on your Mac - Apple Support

     

    .

  • by kazky1,

    kazky1 kazky1 Sep 13, 2015 12:53 PM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Sep 13, 2015 12:53 PM in response to Grant Bennet-Alder

    its definitely a fast network, every other device has no problem, just the macbook, i option clicked the wifi and got the wireless diagnostics twice, it ran through the monitoring and notified me both times of dropouts, but it then just generated a diagnostics report which it saved to my desktop. I didn't get the option to move to a performance window?

     

    It gave me a summary... none of which were useful. It's all very frustrating, its taken me over 5 minutes to message back because of the slow connection and dropouts

    Screen Shot 2015-09-13 at 20.50.26.png

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 13, 2015 1:13 PM in response to kazky1
    Level 9 (61,095 points)
    Desktops
    Sep 13, 2015 1:13 PM in response to kazky1

    Well the MacBook Pro is probably sending the most data at a gulp of any device.

     

    What does it say about Dropouts?

     

    What do you get when you click those other Info buttons?

     

    Conflicting Country codes may influence what frequencies are allowed. and that other item suggests it hates your Router setup.

  • by kazky1,

    kazky1 kazky1 Sep 13, 2015 1:21 PM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Sep 13, 2015 1:21 PM in response to Grant Bennet-Alder

    it doesn't really say anything about drop outs, just its detected a drop out

    Screen Shot 2015-09-13 at 21.17.01.png

     

    and the country code error has disappeared on the newest summary, but the wifi tips shows this,

     

    Screen Shot 2015-09-13 at 21.18.12.png

    and all those things are set on my wifi

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Sep 13, 2015 2:43 PM in response to kazky1
    Level 9 (61,095 points)
    Desktops
    Sep 13, 2015 2:43 PM in response to kazky1

    Click on the [√] Monitor my connection, and use the Window menu to select Performance and Scan and see if you can learn anything more about this.

     

    On the Scan window, see if any other Router is using your 5GHz channel.

     

    On the Performance window, see if your signal drops suddenly, slowly fades over time, or disappears.

  • by n748,

    n748 n748 Oct 1, 2015 8:26 AM in response to kazky1
    Level 1 (29 points)
    Oct 1, 2015 8:26 AM in response to kazky1

    I have the feeling something is not right in 10.10.5. Here is what I get in Wireless diagnostics monitor. Since 10.10.5 (or better some days after upgrading) I need a much stronger signal than before to have an acceptable connection. I used this MBP mid 2012 non-retina for almost 2,5 years basically in the same environments and now it is not working anymore. Any help would be greatly appreciated.

    5GHz.png

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Oct 1, 2015 9:00 AM in response to n748
    Level 9 (61,095 points)
    Desktops
    Oct 1, 2015 9:00 AM in response to n748

    Although it may ultimately be blamed on Software, the graphs you show do not currently support that conclusion.

     

    That graph says the signal strength (RSSI) deteriorated greatly (green line on bottom graph) when you made the move from 1 meter to 4 meters. You need about 20 points difference between signal and noise to have a good connection, and that difference disappears, making a good data rate impossible.

     

    The "quality" graphs tracks the signal strength very appropriately, and the "Data Rate" adjusts itself appropriately as well, frantically trying to get down to a speed where it can work reliably, and ultimately failing.

     

    This looks to me like Hardware problems, but it is not clear if the Router, the Wi-Fi card or its antenna is the problem (or if you were suddenly asking it to transmit through three feet of solid concrete). This does not look like a software issue to me.

     

    excutive summary: You lost your signal.

  • by kazky1,

    kazky1 kazky1 Oct 2, 2015 2:37 AM in response to Grant Bennet-Alder
    Level 1 (0 points)
    Oct 2, 2015 2:37 AM in response to Grant Bennet-Alder

    Mine is still as appalling, every other device in my house connects with issues or drop-outs, I've been waiting for El Capitan to become available to see if it makes any difference at all. I downloaded last night but haven't had chance to test.

     

    I'll be going back to Apple if it's no different as there is not a problem with the router with anything else but the MBP.

     

    Very frustrating.

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder Oct 2, 2015 7:50 AM in response to kazky1
    Level 9 (61,095 points)
    Desktops
    Oct 2, 2015 7:50 AM in response to kazky1

    If not caused by the Router or the distance, Poor signal strength could be caused by a disconnected antenna wire or a bad Wi-Fi card.

  • by Charles Siu,

    Charles Siu Charles Siu Oct 2, 2015 9:27 PM in response to kazky1
    Level 1 (5 points)
    Oct 2, 2015 9:27 PM in response to kazky1

    I should just note - I have this exact same issue with my late 2012 15" Retina MBP...same symptoms...same kind of diagnostics. The interwebs and forums report the MBP as having on again/off again issues.

     

    My MBP was humming along fine, no WiFI issues, when 10.10.5 came along, all of the sudden, very erratic WiFi, slowing to a crawl, jumping back up again, all over the place. I upgraded to 10.11 El Capitan, but it's the same issue.  I can clear plists, and use all the tools recommended, and it works for a few minutes, then degrades.

     

    This is very MBP specific - my 2014 Retina 5K iMac is a scream machine at the same time on the same WiFi network.  My IOS devices also have no WiFi issues. 

     

    Chaz

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