Wifi problem solved on Macbook Pro 2017

Why do I have difficulty with Wi-Fi or Bluetooth devices when USB 3 devices are attached to my computer?

Some USB 3 devices can generate radio frequency interference that can cause Wi-Fi and Bluetooth devices operating in the 2.4GHz band to have issues communicating with your computer. Here are some tips to avoid this issue:

• 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.
• If you're using adapters or dongles on a Mac computer with Thunderbolt 3 (USB-C) ports, plug them into the front port on the left side of your Mac, or into the ports on the right side (if your computer has them). These ports are the farthest away from the antennas, making interference less likely.
• To avoid interference on the 2.4GHz band using Wi-Fi, try using the 5GHz band instead. You can change this on your wireless base station. Bluetooth always uses 2.4GHz, so this alternative isn't available for Bluetooth.

from:

Using USB devices with your Mac - Apple Support

also, any of these items may be involved:

• Power Adapter Cable recall

Apple USB-C Charge Cable Replacement Program - Apple Support

• firmware update for the Apple Multi-Port display adapters (specifically to reduce interference).

About the USB-C Multiport Adapter Update 1.0 - Apple Support

• LG-display recall -- to address Wi-Fi interference so severe, it knocks the Router off the air if too near the Router.

https://9to5mac.com/2017/02/03/lg-fixes-wifi-interference-problems-with-ultrafin e-usb-c-5k-display-new-units-unaffected/

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Hi,

I have same problem actually and it's pretty annoying, because I am not able to use external display, because when I put my USB-c hub to the port WiFi goes down :-/ but it happens actually only with one port.. funny thing is, if you touch USB-c connector where it connects to macbook, everything starts working..

I have just been experiencing the same problem on a newly purchased Macbook Pro 15", I noticed that the ISP, Internet, and Server indicators on Network Diagnostics frequently go red and i have to either restart the wifi or sometimes restart the Macbook. However, as you mentioned in your post, i also noticed that by removing all connectors (I had a USB mouse and Power connected) the problem goes away. I have 2011 Macbook on the same network and it doesn't experience these problems.

It has to be something to do with this Macbook... sorely tempted to take it back.

Exact same issue, It was especially frustrating when I was trying to install drivers for my printer as having it connected through the USB C hub caused the WiFi to disconnect, hopefully if enough people raise the issue the bug will get fixed.

Further information; I am using a MacBook Pro 2017 3.1GHz i5, 8GB Ram, 256GB SSD. And the dongle I'm using is the Lenovo USB C to USB 3.0 Adapter with SD and SD micro slots.

thomasc123

This is a User-to-User support forum. If other users can not help you think of a fix, No further help will is likely to be forthcoming using this medium. There are no standard mechanisms for escalating problems to Apple support from here, and Apple support does NOT monitor these forums looking for trends and outstanding issues.

DO NOT "wait for Apple to provide a fix". Unless and until a large number of users present their issues through standard problem-reporting channels, Apple does not know there is a problem, and is NOT working on a fix. Being selfish is the best policy, getting yours fixed helps everyone.

If advice supplied here does not provide resolution, You must take additional steps to resolve your issues. Contact Apple support directly through one of these methods:

• contact telephone support (free for 90 days with a new Mac, of for three years with AppleCare purchase)

• make an appointment at the genius bar at an Apple-owned store for hardware evaluation and advice (free anytime, but after five years parts may no longer be available).

• initiate an Online chat

• Visit an Apple Authorized Service Provider (there may be an "evaluation fee", but if they perform any service for a fee, ask for a rebate of the evaluation fee).

I solve it here.. Re: Brand new macbook pro - Sierra - Wifi issues - unuseable

And well thought out to send us the details. Just the sort of post that helps the community at large.

I can confirm this works. As ridiculous as it is.

I just shot this video today. It will fix the problem.

FIX for USB-C DONGLES MACBOOK PRO - YouTube