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Wifi dropping in 2016 15" MacBook Pro when USB ...

Hi all,

I'm having an issue that when I plug a Lexar CFR1 Compact Flash card reader into my new 2016 15" MacBook Pro via a USB-B to USB-C cable the Wifi suddenly grounds to halt. The minute that I unplug the card reader the Wifi immediately goes back to normal use. Anyone have any idea whats going on here? Do we need some type of shielded USB-C cable to work on these machines?

I'm having the same issue with an AUKEY usb-c to displayport adapter in a 2016 non touch bar 13" pro (that I needed to get for 60hz 4k output!). Incredibly consistent, every time I plug it in the adaptor works great but wifi completely stops working. I also have the Apple digital AV adapter which causes no such wifi death but can only output 4k over HDMI at 30hz for some reason?!

The next attempt will be the apple thunderbolt 3 -> 2 adapter, I had a hard time locating stock but it looks like apple has it online now, no local stock still though. Totally nuts.

Hi,

I think both of you should use your free 90 days of AppleCare phone support to call Apple and see what they have to say (or make an appointment and see a "genius" at an Apple Store). I suspect their answer is going to be "these are not Apple products, so they're not supported" but you won't know until you try. Get a case number so it's "official" and maybe if they get enough of these calls they'll do something about it, but first they have to know about it.

Appreciate the rational response, getting mad is fun though haha =D

It's nice to vent, I should have been patient and gone straight for the apple adapters but the low availability at launch has been pretty irritating.

Just spoke with Apple support and Mike there had me run the wireless diagnostics, it took a long time to run, more than 10 minutes, and when it was done, the call dropped (it was an iphone on wifi calling coincidentally hah) but simultaneously the laptop switched to the 5Ghz band on the same network and connectivity came back, something I hadn't previously tried.

So, the solution for now might be to get on 5Ghz band of your wifi if that's possible. Got back in touch with support and gave them all details, hopefully this can be helpful to others.

The solution above by Jeddf worked for me, many thanks!

This one has been a real bugger to find, I'm glad I'm not the only one with this issue!

I have been having the same issues with multiple Non-Apple USB-C dongles since I received my late 2016 Macbook Pro 15" in late November of 2016. When the dongles stated below were plugged into any of the four USB-C ports on the Macbook Pro with nothing attached to the dongles themselves, Wifi would immediately drop and not come back until unplugged.

Specs of my unit: base CPU, 460 GPU, and 500gb SSD.

My network priority has been set for Wifi having the highest priority over Internet connection methods.

During all of these tests of dongles, Internet over Ethernet was never used or plugged into the computer.

The routers used to test this was a Westell router at 2.4 GHz (failed case) and an Apple Airport Extreme at 5 Ghz (worked case).

USB-C devices used with issues so far in case an engineer at Apple is trying to replicate this issue:

- Aukey's USB-C to 4 USB3 type A and 1 Ethernet (replicated on two different units)

- ASL's USB-C to 1 full sized Display Port (4k @ 60Hz model)

USB-C devices used with no issues: (everything plugged into these dongles were successful)

- Apple's Thunderbolt 3 to Thunderbolt 2

- Aukey's USB-C to 1 USB3 type A

Being an EE my first guess is that this is either a relatively simple software bug (i hope), a signal isolation issue with the port (unlikely), or the issue lies with Texas Instrument chips used in the Apple dongles (i beleive this is the chip Apple is using), which probably aren't used in the 3rd party options yet, as to why Apple's works and others don't (plausible).

Maybe apple should introduce a beta phase before releasing major OS upgrades.

Oh wait... :/

I've had the same problem with a USBC to USB 3/Ethernet connector. I spend hours looking at Wi-Fi networks, different bands, security setting and concluded that it's not the Wi-Fi network, it is a problem with the connectors and adapters. I tried using net spot, air radar, wireless diagnostics and more software analysing applications and noticed that when the USB 3 adapter was plugged in Wi-Fi noise dropped to almost 0. So despite the network looking like it had good SNR I couldn't get a connection. I'm currently trying USB AC Wi-Fi adapter instead of the internal Wi-Fi and it seems to work. Hope I haven't just jinxed it!

I got the same problem on my 13" MBP as well.

What I found is, if my fingers hold the usb-c connector (the end of the cable from the usb hub ) when it is connected to any of the left side usb-c ports, WiFi connection is restored. Also, if I change the port to be connected to the right side one, it also works fine.

So I guess there are some EMC related design defects on Macbook Pro. I am not sure if earlier versions  also got the same problem.

WHAT IS GOING ON WITH THIS!! SO PAINFUL...

I had the same issue, I saw somewhere on the webb that the cheap dongles are interfering with the 2,4ghz wireless bandwith.

In lack of an new 5ghz router= Wrap it in, Aluminiumfoil. Or just have the Powercord between the mac and the dongle to Disturb the disturbence.

Yeah. I agree with you. I had bought a New MacBook Pro 13" touch bar this afternoon. And I meet this problem exactly.

Even, when plugged in the USB-C on the left side, the "feeling sound" is different with the right sides. On the right, I have the "tik" sound from the USB-C port, the left don't have that.

And the wifi still drop with left USB-C. haizzz. That's disappointed        ☹️    

Hey, I'm having the exact same problem. Only works on the right side ports. Have you managed to solve it ?

I saw this comment:

"Apple states that the back-left port is closest to the wireless antenna (located in/near the lid hinge) and is most likely to affect the wireless signal. They recommend plugging any dongles with USB 3 support into the right-side ports, as these are furthest from the antenna. The front-left may also reduce interference."

in a video that shows the same problem Macbook pro 15" Touchbar 2016 problem - Dongle Interference Wifi - YouTube

最后更新：2017-09-02 02:00:00

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