Catalina SMB problem

Fritz!OS as of yet supports only SMB version 1 which is deprecated and no longer supported on Mac OS Catalina. This applies to the current stable branch of Fritz!OS.

The "Labor"-branch (not yet labelled as stable, but usually quite mature) of Fritz!OS supports SMBv3. So you ought to download the most current "Labor-Version" applicable to your router.

It seems to be the same basic problem with the other posts here: NAS-OSes or 10 year old MacOSes that still offer only SMBv1 and a modern client that out of security concerns refuses to talk this outdated protocol. NAS-vendors will probably roll out updates, too.

BTW, de novo installations of Win10 (not updated ones) also do not support SMBv1 out of the box without tinkering…

I faced same issue with Samba shares today. After migrating my old profile from High Sierra to Catalina, noticed that all my Samba shares stopped working, with the exception of one that was mapped through a static IP address. Rest of shares that required DNS resolution didn't. So I tried everything mentioned in this thread nothing worked.

I then deleted one of the saved shares and created a new one, filling the same network information as before, and noticed the new saved shares had a different icon as before (see pic). The protocol was also determined automatically as I was typing "smb" in the input field.

In a nutshell, the Samba shares need to be recreated, after deleting the old ones. If they show the old way, which is a small blue-ish icon, they won't work (it seems the OS don't even use Samba to attempt to connect to the remote share).

They need to show as gray squared storage icon. See pic below (the first 2 work, the 3rd won't):

Hope this helps someone.

I have been struggling connecting to my QNAP NAS via SMB for a while now too (Catalina 10.15). First I switched to afp protocol which seemed to work better, but I hate workarounds instead of solutions. In the end, this seems to have fixed the problem for me: delete the Finder preferences.

Use the Finder menu to go to a folder (Shift Cmd G) and copy this path in: ~/Library/Preferences/

Then locate the file: com.apple.finder.plist and Delete it (move to trashcan).

I always empty my trash too, not sure if that's important here.

SMB is lightning fast now, faster than it's ever been.

Hope this helps!

Gerard

Try connecting using the IP address of the NAS after allocating it fixed IP in your router

I had to use afp://<servername> to get it to work.

Tks JamieRytlewski !

This solved for me the problem: "I had to use afp://<servername> to get it to work."

It's been fixed in the last macos update 10.15.3. SMB works flowlessly now.

Check you NAS is broadcasting the correct Bonjour credentials.

You may need to reboot NAS, Router and Mac at some point in this battle (that started with Catalina for many of us). Choose a logical order if so. I'd want the router back first the NAS second and the Mac third

You might also want to add your NAS to your login items in system preferences

I was not able to connect my year 2011 iMac to my year 2019 iMac that was running Catalina. Prior to the upgrade to Catalina, I had no issues in this regard. I set both iMacs to use SMB rather than AFP. This in itself did not solve the issue. I then powered down both computers and my router. I then powered up my router, then I powered up the year 2011 iMac, and then finally I powered up my year 2019 iMac. I was then able to connect via Finder on my year 2019 iMac by clicking on Network in the sidebar of Finder and then I selected the year 2011 iMac. I then entered my computer password in the pop-up window.

Go to "force quit" and relaunch the finder first and then connect to server, I don't know why this should work, but it does for me.

For me restarting finder does resolve the issue temporarily (holding OPTION and then right click Finder to restart) but after a day or sometimes 2 days I get the same error again.

I put a shared folder from my NAS into the Finder sidebar to "force load" the network drive, since I did this I don't have the issue anymore.

https://www.apple.com/feedback/ and also Contact Support