Ethernet adapter not working with big sur update?

This one works for me...

https://www.amazon.co.uk/gp/product/B087V7ZFQB/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

I use this....

Plugable USB C to Ethernet... https://www.amazon.co.uk/dp/B087V7ZFQB?ref=ppx_pop_mob_ap_share

Hi guys!

I have also problems on my iMac PRO (2017) running big sur ...with the ethernet connects. I can report that this issue comes with one of the beta releases >= beta 7 ... I hoped that in the full release that issue was fixed but won't.

I could reproduce that the issue comes up more often if iTunes is running. If iTunes is not running it also could happen but not so often. WLAN is currently more stable then cable over ethernet...

Hope apple can fix this ASAP.

Cheers

Same issue, I though I was the only one until I find this support thread. I tried the below steps, and the problem persist.

1. Clean installed Big Sur 20B29 from external USB
2. Ethernet not working, WiFi work, was working just fine with the latest Big Sur public beta.
3. Boot camp windows 10 Ethernet problem persists
4. Performed diagnostic, 
5. Reset SMC NVRAM
6. Clean install again
7. Created fresh test user
8. Ethernet IPV6 to Link only
9. Changed RJ45
10. Disabled DHCP from router to this MAC address
11. Power cycled router
12. Clean install Catalina 19H15 from external USB
13. Ethernet not working, WiFi work
14. DFU Mode, Restore, Revive end up with internet boot error code 3004F
15. DFU Mode Update “Apple Controller Devices Do Not Support This Action”
16. Router allowing 17.0.0.0/8
17. Able to install Big Sur using internet recovery, and problem persist.

This seems to be a firmware driver issue based on what I know so far. I guess the only solution will be for Apple to release a update INCLUDES the updated firmware to get this resolved. Besides that I don’t know what else we can do since I tried everything already.

My mid 2015 MacBook Pro using a Thunderbolt to Ethernet adapter works but not with a Belkin USB 3 to Ethernet adapter. Given my experience with the WiFi bugs in iOS 14 I am further disappointed in the release quality coming from Apple.

I have run into similar problems with two adapters since installing the official Big Sur release - the J5 Create didn't work and a not of incapability came up immediately, the Insignia NS-PUCHUB210-C works for the most part but then glitches out as near as I can tell quite randomly throughout the work day. Looking for Driver patches.

I have the same issue on Macbook pro 2017

My usb-c ethernet was working with built-in driver on Catalina successfully. After upgrading to Big Sur, it was working again for few hours and suddenly it become disconnected. Now it says Cable Unplugged in network preferences.

The producer of my ethernet adapter hasn't provided any driver even for MacOS Catalina and says no driver is needed.

It's corechip SR9900

Bit late reply but I found this as an answer to this problem another website:

"Official release big Sur 11.0.1

Anker USB-C to ethernet works

Tripp-lite USB-3 to ethernet DOES NOT work."

So I assume USB 2.0/3.0 don't work on this iOS anymore, which sucks because I'm in the same boat as you.

Hope this helped a bit

MadokaO - interesting. I tried that adapter and it did not work with my MacBook 2019 or 2014.

I have not tried it with the ethernet on a separate adapter. I might try that.

I've had to get a powered hub - Belkin Thunderbolt 3 Hub.

https://www.amazon.ca/Belkin-Thunderbolt-3-Dock-Pro/dp/B07YLMJZXB/ref=asc_df_B07YLMJZXB/?tag=googleshopc0c-20&linkCode=df0&hvadid=361203164760&hvpos=&hvnetw=g&hvrand=1410244564722968926&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9001016&hvtargid=pla-841066038854&psc=1

I still have some disconnection/freezing with the ethernet cable plugged into this one, but the other devices (usb microphone, usb cameras, headphones, audio interface, iPad) seem to be working better. I'll try the separate ethernet cable with it. Seems a shame to have to spend close to 600 extra to make a very expensive MacBook Pro work properly and have a reliable wired connection. The whole point of ethernet/wired is for more stable connection. Sigh.

Yes, same issue with the full release. I’m also on a 2017 MacBook Air. I looked into the manufacturer providing an updated driver and there isn’t one.

Does anyone know if there is an Ethernet adapter that does work with Big Sur? If so, can you please share the details?

let me know if you found any for big sure until then the only option I have in front of me is to downgrade to Catalina :-!

I have the same hub and it has worked perfectly for me

with my M1 MacBook Air. I suggest exchanging it if

possible. My connection is solid all day,

Belkin USB-C model F2**040, works fine on Big Sur - MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports)