USB C dongle kills wifi on 2017 Macbook pro

Apple is being very disappointing to me... I did my way from Macbook air to macbook and now to macbook pro. My USB-C dongle works fine in Macbook but not in MB Pro as mentioned. I'm certain the problem cause is frequency interference. I put my hand around the dongle cable and Wifi works fine. I remove hand and wifi stops. So I wrapped the 10cm dongle cable with kitchen aluminum foil and now dongle and wifi are working. I write this text with dongle connected and LG monitor connected to HDMI dongle socket and is working well.

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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Might try an alternate solution: High-Performance Workflow Solutions - OWC Digital

Potential sources of Wi-Fi and Bluetooth interference - Apple Support

Known issue:

https://discussions.apple.com/thread/8058469

https://discussions.apple.com/thread/8217244

https://discussions.apple.com/thread/8224484

Pleas make your voice heard:

Apple Feedback http://www.apple.com/feedback

Do not rule out that the hardware device for ethernet/wifi/bluetooth isn't defective or been compromised by the potential for too much heat on these commonly overheating systems when an external monitor is attached.

Their locations are different distance from the antenna in the MacBook, as noted in the Apple article I cited above:

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.

Curious.

According to WavLink:

Why does my wireless mouse or keyboard slow or not work properly when used with the hub?

Most USB receivers for wireless mice and keyboards operate in the 2.4Ghz band. When connecting the receiver to any USB 3.0 port there is potential for interference that can affect the devices performance. The most effective method is to add a short USB 2.0 extension cable between the hub and the receiver to mitigate the effect, and many wireless keyboards and mice come with such a cable for this reason.

Intel has a technical white paper on the behavior for those interested here:

http://www.intel.com/content/www/us/en/io/universal-serial-bus/usb3-frequency-in terference-paper.html

Given this information, I cannot see how it is possible to blame Apple for things not working. Please let me know what you are thinking, because for me the logic is not working.

I can see that the logic is not to work, but why does it work on Macbook? Shouldn't Apple overcome this possible issues before they happen? If the antenna is near USB-C Ports isn't this expected to interfere with other devices? Shouldn't MB-Pro's antenna be somewhere else in the machine? By other hand, if low quality dongles and devices interfere with MB-Pro I think the computer should STOP and simply say "your devices are not suitable for this computer, go to a Apple Store and spend 100$ on our devices and be happy". I wasn't expecting to search the internet for a solution for several hours and make several try and error actions when I have in my hands one "cutting edge machine". This is why I liked my Macbook Air so much, never gave me a head ake! I only swapped to a Macbook because the low disk capacity. And now swapped to a Pro for more speed... but isn't happening.

I am still not following. How is Apple to blame when, if one reads the Intel white paper, this is clearly caused by third-party manufacturers not properly testing or shielding their products? Intel is completely transparent about their testing methods, and they clearly say where the blame lies. I would really like to learn here, but I just don't see what possible logic leads you to believe this is an Apple problem.

I don't say Apple is to blame (due to malfunctions) and I may agree that 3rd party devices may be the faulty ones. If you have a good and expensive car that doesn't perform well on the road you can not blame the road all the time! What I'm pointing here is that I would expect more from Apple because is Apple that is forcing us (users) to use external devices. Apple should provide a way things to WORK WELL or NOT TO WORK at all. What frustrates me is waisting my time trying to figure out what is the problem, because (in my case) I have a dongle that under certain conditions let my Mac work and others doesn't. To be clear and pointing forward: a) If Apple continues to provide MacBooks only with USB-C ports then should work with external devices (at least) as well as others makers - I can't understand when a device works with Windows and not with Apple's Mac (I expected to be the other way around! That's one of the reasons I changed from Windows to Mac); b) If a) is not possible Apple should certify ALL the external devices from 3rd parties making a list in their website with makers and models that I can buy and be sure it will work in my Mac. As a user I can not rely on a maker that states his product is Apple compatible - Apple should state that!

If you stay on the road Apple has sprinkled with flower petals, things work well.

Head out on your own with third-party adapters, and you can quickly end up in the deep woods.

Next time buy the tried and tested Apple adapters and save yourself some grief.

Here's a fun twist! For me wifi dies if the USB dongle is plugged into the BACK plug but fine for the front plug. Are they different???