2018 MacBook Pro randomly losing WiFi connection

My month-old Mac has randomly started dropping my WiFi connection without any notification. One moment it's working fine, the next I'm offline. According to the WiFi dropdown in the menubar, my machine is behaving as if I had clicked to disconnect from the network; WiFi is on but not connected, all networks that should be in the list of nearby networks are there, and clicking on my network connects back up in under a second and I'm back to working again online... until it drops again anywhere from ten minutes to a few hours later.

This issue started almost immediately after installing "macOS High Sierra 10.13.6 Supplemental Update 2 for MacBook Pro (2018)" from the Mac App Store and is affecting me on any WiFi network I connect to now if I'm connected long enough. It's usually just a minor inconvenience, but if it went down at just the wrong time it could cause serious issues with what I use it for. My 2011 MacBook Pro, also running macOS 10.13.6 but without the update specific to the 2018 model, doesn't have this issue... nor does any other device in the house, including a 2014 MacBook Pro, two 2007 MacBooks, and a 2009 iMac which are also all on the latest versions of macOS that they support. (Same for all the iPhones, iPads, and Apple TVs in the home) It looks like this bug is reserved for those with the latest and greatest portable Macs, so I'm out of luck until a fix comes around.


Does anyone have any ideas as to what may be causing this? I'm pretty sure it's an issue with the recent update; my Mac doesn't have a whole lot on it yet besides Apple apps and Adobe Creative Cloud software, and I don't browse anywhere or download anything from anywhere that could have given me anything unpleasant on my system. I basically treat this thing like a baby, so there seriously shouldn't be any issues with it already. My MacBook Pro and AirPort Extreme are both on the latest software version they have available, and I've troubleshooted both devices.

MacBook Pro (15-inch, 2018), macOS High Sierra (10.13.6), TimBook Pro

Posted on Sep 10, 2018 10:37 PM

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Posted on Apr 11, 2019 2:26 PM

So, after more analysis I found this issue only repeatable when I had ANYTHING plugged into USB-C


This hard to find article explains the problem. https://support.apple.com/en-au/HT201163

If your USB device has a cable long enough that you can move the device, place it away from your Mac—and make sure not to place it behind your Mac, or near the hinge of its display. The antennas for Wi-Fi and Bluetooth are located there, and USB 3 devices placed there might interfere with your wireless connections.


Some Genius decided to put the USB-C ports right next to the WiFi antenna. The noise for a in proximity USB-C device can cause the issues reports. Sounds like a significant design flaw IMHO. Fixed by using a non-apple USBC hub with a longer cable than the apple designed USBC dongle. Also have USBC extension cables on order.

239 replies

Feb 21, 2019 11:53 AM in response to sirozha

Yeah, I'd say the same ^^. So far it sounds quite unbelievable. But the onboard Wi-Fi-Tool ist still analysing without any interruption. The next milestone will be the 48+ hours, because that was the longest time without a disconnect by just disabling awdl0 (which reactivated itself sporadically).

Would be cool if others would also tell their experiences.

Feb 21, 2019 12:51 PM in response to cgn1026

@cgn1026:


There are two ways to AirPlay:

  1. Utilizing your existing Wi-Fi (or wired)network , whereby the Apple TV is discovered via the existing network.
  2. Utilizing Bluetooth Low Energy (BTLE) for discovery and Apple Wireless Direct Link (AWDL) for data transfer.


The second method doesn't require for the Apple TV and the other device projecting to the Apple TV to be on the same network.


Therefore, you can disable the Also Allow Nearby to Airplay option under Settings > AirPlay > Allow Access and still be able to AirPlay to your Apple TV via your existing Wi-Fi (or wired) network. This setting should stop the Apple TV from using AWDL. We are suspecting that AWDL is what's causing all these Wi-Fi issues with the 2018 MacBook Pro / Air models. And now, we are trying to figure out if it's the Apple Watch or the Apple TV (or maybe both!) that are causing these Wi-Fi issues with the 2018 MacBook Pro / Air.


Thanks.

May 19, 2019 11:44 AM in response to d--bar

From the log right when the connection gets lost. Filtering for "wifi" in the log:


========


default 11:33:08.454244 -0700 symptomsd linkQuality changed to -2 as loaded LQM changed on interface type 1 noi: NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:1

default 11:33:08.454375 -0700 symptomsd linkQuality changed to -2 as loaded LQM changed on interface type 1 noi: NOI: v:0 type:Wifi, isAny:no, isBuiltin:yes, loi:-1, flags:0

default 11:33:08.454584 -0700 symptomsd linkQuality changed to -2 as loaded LQM changed on interface type 1 noi: NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0

default 11:33:08.454703 -0700 symptomsd NOICLIENT <0x7f7f45109930> observed linkQuality of object NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, partial update to pid: 126, change: {

kind = 1;

new = 0;

}

default 11:33:08.455183 -0700 symptomsd NOICLIENT <0x7f7f45109930> observed powerCostDL of object NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, partial update to pid: 126, change: {

kind = 1;

new = 0;

}

default 11:33:08.455480 -0700 symptomsd NOICLIENT <0x7f7f45109930> observed powerCostUL of object NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, partial update to pid: 126, change: {

kind = 1;

new = 0;

}

default 11:33:08.455745 -0700 symptomsd noi: NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, event: linkQuality, rawLoadedLqm: -2, don't qualify

default 11:33:08.473111 -0700 rapportd SysMon: WiFi link changed

default 11:33:08.473178 -0700 sharingd SysMon: WiFi link changed

default 11:33:08.473878 -0700 rapportd SysMon: WiFi state changed: Connected -> NotConnected, 0x0 < >

default 11:33:08.473910 -0700 rapportd WiFi state changed: Connected -> NotConnected, 0x0 < >

default 11:33:08.473952 -0700 sharingd SysMon: WiFi state changed: Connected -> NotConnected, 0x0 < >

default 11:33:08.474004 -0700 sharingd WiFi state changed: Connected -> NotConnected, 0x0 < >

default 11:33:08.474532 -0700 rapportd SysMon: WiFi SSID changed: NULL

default 11:33:08.474587 -0700 sharingd SysMon: WiFi SSID changed: NULL

default 11:33:08.534406 -0700 CommCenter #I On WiFi: true On Cellular: false

default 11:33:08.566041 -0700 symptomsd wifi no longer primary, letting others know

default 11:33:08.566143 -0700 symptomsd stopPollingWifiFlows

default 11:33:08.566255 -0700 symptomsd WiFi epoch change

default 11:33:08.566330 -0700 symptomsd 0x7f7f45010760 event: kNotificationNewConnectivityEpochWiFi, noi: NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:1, fastpath, current elig: 1, new elig: 0

default 11:33:08.566709 -0700 symptomsd 0x7f7f45010760 event: kNotificationNewConnectivityEpochWiFi, noi: NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, fastpath, current elig: 1, new elig: 0

default 11:33:08.566880 -0700 symptomsd NOICLIENT <0x7f7f45109930> observed isTrafficEligible of object NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, partial update to pid: 126, change: {

kind = 1;

new = 0;

}

default 11:33:08.580199 -0700 symptomsd noi: NOI: v:0 type:Wifi, isAny:yes, isBuiltin:no, loi:-1, flags:0, event: kNotificationNewPrimaryInterface, rawLoadedLqm: -2, don't qualify

default 11:33:08.570010 -0700 symptomsd NWPath: kNetworkWiFi NWPathStatusSatisfied interface en0 index 10

default 11:33:08.612049 -0700 symptomsd wifi no longer primary, letting others know

default 11:33:08.612159 -0700 symptomsd stopPollingWifiFlows


======


pid 126 is contextstored, not sure if it's relevant


0 126 1 0 Wed08PM ?? 0:33.24 /System/Library/PrivateFrameworks/CoreDuetContext.framework/Resources/contextstored


Oct 1, 2018 3:05 PM in response to TimsTech

I am having precisely the same problem as described in the original post. Only, my pro is older, around 2012. My problems started the day after I downloaded the supplemental update. It happens randomly and also seriously impacts my online work. I have looked at the articles and tried all the troubleshooting steps. My router is an apple and all my other devices have a stable connection, including two iPads, two phones, an apple TV, two fire sticks, and a kindle. My mac have never had a connection problem before and was perfectly fine before the update.


Has anyone found any solution?

Dec 8, 2018 11:58 AM in response to dingorock

Another new 15" 2018 MBP with this problem. Over the last few months this has been occurring, I haven't noticed any correlations when it happens. So far, it has occurred with both with High Sierra and Mojave, both 2.4 GHz and 5 GHz, and both Airport and 3rd party routers.


Sometimes the wifi indicator is not greyed out even though packets have stopped flowing. I can usually fix it by turning wifi off and on, but doing so regularly is quite disruptive.

Dec 20, 2018 4:43 AM in response to TimsTech

I have exactly the same problem with MacBook Pro Touchbar 2018 (macOS Mojave 10.14.2). I tried with multiple routers (older ones with 802.11g, 802.11n) and I bought a new 802.11ac router and I experienced the same issue with all routers. Sudden WiFi drops, huge packet loss even if I try to ping the router (so not an ISP issue).

I tried all the solutions I found over the internet. System reboot, new Mac profile, I tried to delete WiFi settings (and no, I have no USB dongles plugged in to the mbp). Nothing worked.. Its really.. really annoying. While on my old notebook (Lenovo) and on my iPhone I have zero problem with the network.

Jan 23, 2019 8:49 AM in response to cossieos

I can agree that this happens to certain routers only. I have Macbook Pro 2015 and have only issues at one location. What is interesting that during the outage ongoing Facetime call continues normally but all other traffic is cut. So far I am only relieving with console + ping command to 1.1.1.1 and when I see icmp_timeout I renew DHCP. For me this happens sometimes every hour. I am getting annoyed that I use the script which is online that will detect outage and renew DHCP (but this is not solution to bug in MacOS).

Is there any debug command WIFI? Console shows nothing. Or any any idea how to debug more?

Jan 28, 2019 10:14 PM in response to FirenzeMedia

Besides that I have multiple internet providers and using different routers and networks, it is a laptop so it does connect to numerous routers when I am out. The problem is not the router. it is simply losing the connection. It will not discover any network anymore, while it still recognises the card in the system report. It happens when it is on a charger (and yes I have tried multiple chargers). As it is happening with different airport cards from original MacBook Pro's and with cheap Chinese replacement cards (that work flawlessly in other Macs) I am pretty sure it is a mainboard problem.

Feb 2, 2019 2:11 PM in response to TimsTech

Hi folks, good to see that I'm not alone with this issue. Bought a new MacBook Pro 15" 2018 nearly two weeks ago after my MacBook Pro 17" Mid2010 died. I had never any WIFI issues on any iOS or macOS device until I got the MBPro 2018. Currently it's running with 10.14.3.

Until yesterday I used a TimeCapsule from 2010 to establish the 5G-WIFI-connection. for testing reasons I turned WIFI on the TimeCapsule of and moved every device to another Router (AVM FritzBox 7390) and made sure that I use unused 5GHz-Channels and the SSID is visible. I think (but I'm not exactly sure) that I have less WIFI drop outs but they still happen. It's **** annoying. Currently I'm using a wired connection through a USB-C Adapter. It's not funny if you download the whole 60GB SoundLibrary from LogicPro X if you're always loosing the WIFI Connection.

Do something Apple!

Feb 3, 2019 3:31 PM in response to TimsTech

So oddly, after spending a bunch of time trying to sort it out either on my laptop or working with my router and channels...I noticed that when I was using my AppleTV, it would randomly cut back to the menu screen. I could go back and watch the show immediately after and it was fine but it started around the same time as my laptop. I also noticed that the same time it cuts out on my laptop, my phone loses the WIFI icon. I had Comcast check the router and tried a new router, didn't make a difference, channel didn't matter, changing settings didn't help. Finally, I switched over to Fios and I haven't had the issue since. I only ever had the issue with Comcast and their router so I'm not sure if they did some sort of update to their system but worth checking if you've exhausted everything else.

Feb 15, 2019 2:06 AM in response to keithos27

Hi Tims Tech.


I having this problem too on om my MBP 2018. This is my second new from the box.

I have a ticket open with apple. I also see problem as shown in the screenshot.


  • low speeds 54mb/s (but sometimes as high as 405mb/s although my routers permit 300mb/s)
  • NO model info on the network card (empty)
  • errors on the transmitting packets
  • NO receiving packets are reported !!


And now the MBP2018 starts losing connection with wifi. I got an replacement MBP2018 from apple new from the box... same issues.

I have also a MBP 2017 which has none of these problems on my network what so ever.

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2018 MacBook Pro randomly losing WiFi connection

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