Have you fixed this? I've got the same problem. Brand new MPB 2.6/16GB/512GB/560X (same as you). Randomly looses internet connection while connected to the router. All other units works, but not my Mac. If I wait a while it starts working again.
I've found out that if I hold down option and press the WiFi icon in the toolbar, it reconnects almost immediately. Also the solution you provide, turning WiFi on and off works as well. Super strange... The Mac was installed clean (no backup) and I tried to reinstall the operating system.
Any clue what could be done to fix this? Or is this just mainly a hardware problem?
WiFi issues...
Hi DCWolfe,
Yes, I've seen and carefully documented numerous WiF-related connectivity issues on three different 2018 MBPs.
I have a strong signal to noise ratio (RSSI=-40dBm, Noise=-90dBm as measured by the 2018 MBPs) using a 5GHz router (actually I also tested a second 5GHz router and found the same 2018 MBP WiFi problems).
When I see the WiFi connectivity problems on the 2018 MBP, my iMac, 2016 MBP, 2015 MBP, iPhones, Apple Watch, HomePod, Linux PCs, Raspberry Pis, WiFi speakers, Alexa, etc., all still have WiFi connectivity -- i.e., the WiFi problems only exist on the 2018 MBPs.
This is not a WiFi hardware problem directly, as I've performed Wireshark packet sniffing (promiscuous mode) of my WiFi LAN from another computer during the WiFi connectivity problems on the 2018 MBPs and found that the 2018 MBPs were still sending and receiving some WiFi packets. At times it looked like the 2018 MBPs lost their DNS service, but when I checked (scutil --dns) the 2018 MBPs still has the correct DNS servers.
But this problem is also more multifaceted than just DNS and WiFi routers, since I've also seen multiple AirDrop failures on the 2018 MBPs too. Now AirDrop uses bluetooth (zeroconf, Bonjour) to establish a P2P (peer-to-peer) private and firewalled WiFi connection, thus should be independent of the WiFi router and wireless LAN (otherwise you wouldn't be able to do AirDrop unless you were attached to a WiFi router -- but you can). I've seen numerous AirDrop failures from my iMac to the 2018 MBPs (located on the same desktop), I've seen numerous AirDrop failures from my iPhone X to the 2018 MBPs (iPhone held in my hand sitting at my desk), and I've seen numerous AirDrop failures to the 2018 MBPs from my 2016 MBP (located in the same room about 8 feet away). I've also done packet sniffing during the AirDrop failures and found packets from the 2018 MBPs, so the WiFi hardware was still working. And again, these AirDrop failures only occur when AirDropping to the 2018 MBPs, I've never seen these issues between any other pairs of my other Apple devices, only when one device is the 2018 MBP have I seen AirDrop failures.
I've experienced multiple rsync and ssh "broken pipe" errors that kill my large data set transfers to and from the 2018 MBPs (rsync, by the way, is what Carbon Copy Cloner uses to perform its cloning magic).
I've had Mac App Store updates fail on the 2018 MBPs while simultaneously my iMac and 2016 MBP were successfully updating from the Mac App Store over the same WiFi LAN connected to the same WiFi router.
I've had third party software updates fail (like MacPorts, GPGTools, and TexLive) while my iMac and 2016 MBP were simultaneously successfully updating over the same WiFi router.
I've seen the macOS (after SSD erasure and clean install of the macOS from the network with no other software nor files transferred to the 2018 MBP) improperly delete a file from an SMB-mounted RAID0 HDD. I've only ever seen this happen from the 2018 MBP, not from any of my other Macs or Linux PCs which I've been using for the last decade. Most likely another WiFi connectivity issue on the 2018 MBP.
In my hands, these WiFi connectivity issues are
rare (I worked on the 2018 MBPs for around 18 hours a day and I'd experience a WiFi problem about every 1 to 3 days),
random (I couldn't figure out how to consistently reproduce these WiFi issues), and
often intermittent (numerous times I've seen the WiFi connection re-established on its own in less than a minute, but I've also waited for 150 minutes and not had it "self-fix" and so had to fix it manually). Therefore, because of the rare, random, and intermittent nature, Apple service has an extremely difficult time finding the problem (the WiFi hardware passes hardware tests and the WiFi disconnections happen so rarely that unless you are using the machine for long periods you won't see them). I also suspect that these WiFi disconnections are much more prevalent than it appears simply because of their intermittent self-fixing nature. For instance, while watching YouTube videos you would probably rarely see a self-fixing WiFi disconnection because of buffering of the videos.
If you wish, the following link contains further information (and other solouki posts on this page 95 lists potentially related issues):
https://forums.macrumors.com/thread...bridge-os-error.2128976/page-95#post-26679910
By the way, I very carefully documented all of these WiFi connectivity issues, including pcap packet capture files, and uploaded the documentation to Apple Support, all to no avail.
Good luck to you. I hope you find a solution, but in my hands I couldn't solve this problem -- yes, I can manually fix the disconnections, but I couldn't stop the disconnections from happening.
EDIT: Interestingly, I searched these forums for YouTube video issues on the 2018 MBPs, and did find some posts listing problems watching/listening to YouTube on the 2018 MBPs that could(?) be attributed to intermittent WiFi connectivity issues.
EDIT 2: Forgot to mention, I have these WiFi connection problems even when nothing is attached to the 2018 MBPs, i.e., no USB devices plugged into the T3 ports.