Big Sur Beta 7 breaks SMB?

After the upgrade from Beta 6 to Beta 7 I am not able to connect to any smb-shares any more. I tried it with a Windows Server, Synology DriveStation and a Debian implementation. I'm directly getting the message Error with connection.
Answered by TyngJJ in 631059022
Unredacting the logs reveals the issue, insufficient permissions to load the kernel extension. Just run this (once):
sudo kextload /System/Library/Extensions/smbfs.kext

Edit: filed as FB8628919
Hello, it is Beta 6 (20A5364e). I experienced the same behavior and I just submitted a Feedback report. It seems afp protocol is still working.
Same here, Feedback report written, hope, we get an updated Beta soon....

No Solution in the Moment to see...
Terminal cmd line also does not work to mount an SMB share unfortunately. Big Sur Dev Beta 6.
I can confirm the same thing on my end. As of 20A5364e, I can no longer connect to SMB share located on macOS Mojave 10.14. No login screen, no delay, just an immediate generic network error message.
Same here .... Just installed Beta 6 and all SMB shares immediately pop up with "Connection Failed" message. Any ideas?

Accepted Answer
Unredacting the logs reveals the issue, insufficient permissions to load the kernel extension. Just run this (once):
sudo kextload /System/Library/Extensions/smbfs.kext

Edit: filed as FB8628919
I can also confirm the same behaviour, feedback report submitted.
TyngJJ's fix worked for me. Thank you!
with me the solution of TyngJJ has worked
Did this on both machines and it's working again. Thanks to TyngJJ 

Unredacting the logs reveals the issue, insufficient permissions to load the kernel extension. Just run this (once):
sudo kextload /System/Library/Extensions/smbfs.kext
Edit: filed as FB8628919


worked here too. thanks.
TynJJ solution worked for me as well. Thanks!
Thank you TyngJJ, worked for me as well!
Thanks TyngJJ.

Running the command fixed the problem.
Code Block
sudo kextload /System/Library/Extensions/smbfs.kext


Thank you. This worked for me!
Thank you TyngJJ!!! Was getting worried I couldn't utilize my iMac with Big Sur because of this same issue
Since updating the latest public beta today, I cannot see my external thunderbolt drives on Finder. sudo kextload /System/Library/Extensions/smbfs.kext doesn't work either.

Any solutions, as I'm pretty much stuck now with a lot of important files on the external drives.
It's really helpful!
Run sudo kextload /System/Library/Extensions/smbfs.kext
Thanks, TyngJJ!
very helpful. the code worked.
Thanks for the workaround!

The issue affects Parallels Desktop too as it uses SMB to share in-VM files with macOS.
Thank you TyngJJ, your code worked here..
This command will work until you restart, but after the restart the command needs to be executed again.
Is there a permanent solution to it?
This command will work until you restart, but after the restart the command needs to be executed again.
Is there a permanent solution to it?
/usr/bin/kmutil load -p /System/Library/Extensions/smbfs.kext
  • command brings smb back to life!

Thank you!
I also have a problem with Parallels 16, having installed the code suggested (sudo kextload /System/Library/Extensions/smbfs.kext.) ever time I open the app its crashes the Mac back to start up, any ideas for as fix?
Big Sur Beta 7 breaks SMB?
 
 
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