Level 1

107 points

NAS Access in Catalina issues

Since upgrading to Catalina my access to NAS shares is problematic.

I have a QNAP NAS unit, with APFS and SMB (1/2/3) enabled.

I can see the NAS in finder under 'Locations' but when I click on the NAS I get 'connection failed'. Using 'Connect As' does nothing at all.

I manage to connect using 'Connect to server' with the command: afp://NASNAME(AFP)._afpovertcp._tcp.local

It asks me which 'share' I want to connect and all works well.

If I then go back through finder to the same share I get the same 'connection failed' issue, even though the mounted share shows on my Desktop.

Any ideas please?

Mac mini 2018 or later

Posted on Oct 28, 2019 4:06 AM

Top-ranking reply

Jamsbe

Level 1

4 points

Posted on Feb 5, 2020 11:53 PM

I was having this problem with Catalina and my Synology, and this article solved it for me.

https://www.techarp.com/software/macos-catalina-nas-failure/

The Cause Of The macOS Catalina NAS Connection Failure

From what we can tell, this issue is happening because Apple apparently dropped support for SMB1 and SMB 2.0 in macOS Catalina. With many NAS defaulting to SMB1 for compatibility reasons, users will immediately lose the ability to connect once they upgrade to macOS Catalina.

The Fix:

Log into your NAS
Go to Control Panel > File Services.
Under the SMB section, click on Advanced Settings.
In the Advanced Settings pop-up, you will find that the Maximum SMB protocol is probably set to SMB1.
You need to set the Maximum SMB protocol to SMB3.
Now, this is not necessary, but while you are here, you might as well just set the Minimum SMB protocol to SMB2 and Large MTU.
Then click Apply at the bottom of the Advanced Settings pop-up to save the settings.

I did it and my Synology NAS access from Catalina has been rock solid for the last 48 hours!!!!

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Similar questions

312 replies

Jun 4, 2020 8:23 AM in response to bruno_l

@bruno_I --> What is method 1 ???

Jun 4, 2020 8:34 AM in response to lexvo

@lexvo, this solution does not work for me, as the share appeared with a question mark:

Datajack

Level 1

4 points

Jun 4, 2020 8:35 AM in response to Fly_PetitPrince

Many people here have said that method (just enabling SMB 3 and setting to SMB 2 minimum) doesn’t work, including in the comments on that very page. Doesn’t fix the issue.

Mike_App

Level 1

20 points

Jun 4, 2020 2:45 PM in response to Datajack

I got the ? as well, even when not moving the shares directly. but using the link on my desktop instead.

bruno_l

Level 1

9 points

Jun 4, 2020 11:15 PM in response to Fly_PetitPrince

What I described as method 1 is was to use the hosts file on MacOS to override name resolution.

Jun 29, 2020 9:40 AM in response to raimond33

Lucky you, I still have problem with TimeMachine which fails......

Fly

Jul 8, 2020 11:34 AM in response to stoobloo

Is this issue still not solved? I'm still experiencing this issue.

jmow

Level 1

44 points

Jul 9, 2020 7:07 AM in response to wjvangerwen

> Is this issue still not solved?

It has been solved.

jmow

Level 1

44 points

Jul 9, 2020 1:51 PM in response to JPG_master

> Thx for that.

JPG_master, you're welcome! 😊

Cemento

Level 1

9 points

Jul 19, 2020 10:37 AM in response to DerSlon

If confirmed, it’s 9 months to get back where we were.

Lesson learnt: skip OS upgrade if you are happy with that.

Aug 21, 2020 4:01 PM in response to stoobloo

For what it's worth, Cemento's workaround is still working for me after several months. It's not perfect, but it appears to be the best that we're going to get for Catalina.

[Edited by Moderator]

Aug 21, 2020 6:38 PM in response to Cemento

@Cemento: No, 10.15.6 hasn't fixed the issue for me. I've tried to provide details but my messages keep getting edited or deleted, and I keep getting banned.

Rob_VB

Level 1

8 points

Aug 21, 2020 11:56 PM in response to Cemento

Not working for me!

Mike_App

Level 1

20 points

Sep 22, 2020 3:06 PM in response to ecarlseen

The best what you and actually everyone of us could do is to write a personal letter to Tim.

Alternatively, write to Computer Magazines around the world. Because nothing else has helped so far.

Nov 19, 2019 1:47 PM in response to stoobloo

Same problem here. Very frustrating. I found restarting Finder to work, but that's not practical to do constantly, nor do I know if it will work every time. I hope Apple and Synology can get this working again.

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NAS Access in Catalina issues