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Mounting smb shares after upgrade to Catalina not working

I have a NAS storage device connected to my router on my internal network which is protected by a username & password. Prior to the upgrade to Catalina my 2016 15" Macbook Pro had no issues connecting to these shares using smb://routername/share. After the upgrade to catalina I can no longer connect to the network shares. It keeps asking me for my username & password, and no matter what I enter the dialog box keeps coming back. When I try on the command line using "mount_smbfs //username:password@routername/share mountpoint" I keep getting the error message "mount_smbfs: server rejected the connection: Authentication error". If I go into the router and remove the credentials from the shares, then the mount works fine. I know the credentials are correct (I reset them in the router).


I've also re-enabled NetBIOS as described in this article (https://medium.com/@gobinathm/how-to-access-smb-printer-shares-in-macos-catalina-10-15-17ea91d2c10b) but that did not help.

MacBook

Posted on Oct 8, 2019 6:12 AM

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Posted on Oct 15, 2019 1:38 AM

not really, i am using synology and ban the smb 1.0 in file sharing. it does not work and i try to open the netbios as i searched online. not work. the only i find helpful is to select the 'Go' in Finder and connect as afp://yourserver it works well.

and waiting for the upgrade from apple.


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74 replies

Oct 14, 2019 5:20 AM in response to YichenLiu

This may be helpful for someone who has been unable to connect to a network drive using SMB. I found a very simple solution.


I have a local network that includes a Mac mini server with an attached USB drive, and after upgrading to MacOS Catalina I was unable to mount the drive from any computer on the network.


I found many posts on various forums that reported the problem but none of the suggested "solutions" solved the problem for me. (And on one forum I was even chastised for reporting the ineffectiveness of two suggested solutions.)


Here's how I solved the problem:


On the Mac mini server I displayed the Info window for the attached USB drive and selected "Shared folder".


Now I'm able to access the drive from my other computers on the network.

Oct 14, 2019 3:49 PM in response to edeandrea

Any feedback from Apple ? I just got this from their online chat support so not helpful at all:


"I see what you mean. In this case we would want to reach out to the manufacturer of that device to see if they are aware of the issue or know of a resolution. They may be working to correct it now or already have some steps in place to correct the issue.

Sometimes third party devices will have issues when a new macOS is released, but they are usually pretty good about coming out with updates to correct it or will have a work around in the meantime."


My NAS is a Buffalo LS-WTGLF92

Authentication set for: Delegate Authority to LinkStation

Oct 17, 2019 2:24 PM in response to edeandrea

This is a monumental cock up from Apple. It's not just smb shares from what I am hearing. Photoshop and other Adobe errors too.


My situation is that my MacBook can't access any of my network files/folders - NAS drive, 4 PC's - but they can all access the MacBook shared folders.


As most of my required files are on the NAS for my work as a freelance writer, I've lost a day and near on a grand because of this. I feel like billing Apple for the lost time.


I can't even use the PC's for the work as they are set to do different tasks and don't have the relevant software to run the files I need on NAS.


Surely Beta testing should have pulled these problems out, but I guess they were just in a rush to get it out there without doing their jobs properly.


Well done Apple

Oct 18, 2019 4:04 AM in response to edeandrea

I had the SMB connection issue to my USB storage that was attached, and shared from, a Billion Bipac 8800AXL R2 modem/router. This share was available as a Network share on my iMac when it was running Mojave. After I upgraded to Catalina, and enabled Netbios support, it was not accessible.


I then purchased a Raspberry Pi 4 and attached my USB storage to it and enabled SMB sharing on the Pi. Now, both guest and user access via my iMac works. This implies to me that the issue is with Catalina not supporting the same SMB server configurations, versions, etc. as Mojave does.


FWIW - my SMB configuration on the Pi is as follows :


root@raspberrypi:~# smbstatus -d 4 -v


using configfile = /etc/samba/smb.conf


lp_load_ex: refreshing parameters


Initialising global parameters


rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)


Processing section "[global]"


doing parameter workgroup = WORKGROUP


doing parameter log file = /var/log/samba/log.%m


doing parameter max log size = 1000


doing parameter logging = file


doing parameter panic action = /usr/share/samba/panic-action %d


doing parameter server role = standalone server


doing parameter obey pam restrictions = yes


doing parameter unix password sync = yes


doing parameter passwd program = /usr/bin/passwd %u


doing parameter passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .


doing parameter pam password change = yes


doing parameter map to guest = bad user


doing parameter usershare allow guests = yes


pm_process() returned Yes


Registered MSG_REQ_POOL_USAGE


Registered MSG_REQ_DMALLOC_MARK and LOG_CHANGED


lp_load_ex: refreshing parameters


Initialising global parameters


rlimit_max: increasing rlimit_max (1024) to minimum Windows limit (16384)


Processing section "[global]"


doing parameter workgroup = WORKGROUP


doing parameter log file = /var/log/samba/log.%m


doing parameter max log size = 1000


doing parameter logging = file


doing parameter panic action = /usr/share/samba/panic-action %d


doing parameter server role = standalone server


doing parameter obey pam restrictions = yes


doing parameter unix password sync = yes


doing parameter passwd program = /usr/bin/passwd %u


doing parameter passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .


doing parameter pam password change = yes


doing parameter map to guest = bad user


doing parameter usershare allow guests = yes


pm_process() returned Yes




Samba version 4.9.5-Debian


PID     Username     Group        Machine                                   Protocol Version  Encryption           Signing              


----------------------------------------------------------------------------------------------------------------------------------------


990     nobody       nogroup      192.168.1.100 (ipv4:192.168.1.100:55921)  SMB3_02           -                    -                    




Service      pid     Machine       Connected at                     Encryption   Signing     


---------------------------------------------------------------------------------------------


PiDisk       990     192.168.1.100 Thu Oct 17 10:20:17 AM 2019 BST  -            -           




Locked files:


Pid          Uid        DenyMode   Access      R/W        Oplock           SharePath   Name   Time


--------------------------------------------------------------------------------------------------


990          65534      DENY_NONE  0x100081    RDONLY     NONE             /media/pi   External HDD/amr   Thu Oct 17 10:25:58 2019


990          65534      DENY_NONE  0x100081    RDONLY     NONE             /media/pi   External HDD/amr   Fri Oct 18 10:12:46 2019


990          65534      DENY_NONE  0x100081    RDONLY     NONE             /media/pi   .   Thu Oct 17 10:25:30 2019


990          65534      DENY_NONE  0x100081    RDONLY     NONE             /media/pi   External HDD   Thu Oct 17 10:25:53 2019


990          65534      DENY_NONE  0x100081    RDONLY     NONE             /media/pi   External HDD   Fri Oct 18 10:12:44 2019



Oct 20, 2019 8:14 PM in response to Paul Johnson13

While I tend to agree... I can see why they remove old/outdated network and communication methods that pose security risks. SMB 1.0 is not secure, and can pose a security threat. Windows 10 disables it. However, they do still provide the option to enable it again, while still providing a warning that it's not secure. Apple could do something similar or same.

Oct 26, 2019 6:32 AM in response to edeandrea

All -FWIW -


Apple support had me log my iMac's activity when it tried to connect via SMB to my NAS device. They then investigated the logs.


This week they told me that my NAS device's SMB implementation didn't support some fix to a security flaw reported by Microsoft. I find this explanation interesting since I have a Windows 10 PC with the latest (1903) Microsoft major update installed. And the Windows PC can access the same USB-attached storage on the same NAS device that Apple tells me doesn't support this security fix. It seems odd that Microsoft haven't implemented the fix to the flaw that they have reported and Apple have.


For me personally this issue is now academic since I've moved my USB-attached storage to a Raspberry Pi 4 device, which works perfectly with the iMac and Catalina. But for others, they may want to check with their NAS suppliers about this fix.

Mounting smb shares after upgrade to Catalina not working

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