MacOS High Sierra 10.13.2 causing Finder crash

Since updating to MacOS High Sierra 10.13.2 (from 10.13.1), I cannot connect to my NAS unit or other computers on the network, and in attempting to do so, Finder crashes and will not relaunch. I cannot find a fix to this problem, and as a consequence, my MacBook Pro (with TouchPad 2016) has become an island. I share files between computers on the network as part of my work process so this is a pretty big issue.

MacBook Pro (15-inch, Late 2016), iOS 10.3.2

Posted on Dec 7, 2017 9:05 PM

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Posted on Jan 9, 2018 9:02 AM

The problem seems to stem from defaulting the connection to SMB version 3, which is somehow broken. Changing the connection string to CIFS:// reverts to the much slower SMB version 1. The solution to maintain relatively speedy connections and avoid the bug is to set the default connection to SMB version 2, instead. This will also maintain compatibility with Windows servers where SMB1 is disabled.


This answer from the JAMF forums seems to do the trick. Enter these two lines in the terminal. You will be asked for your admin password:

sudo echo "[default]" >> /etc/nsmb.conf sudo echo "protocol_vers_map=2" >> /etc/nsmb.conf

157 replies

Jan 4, 2018 11:26 PM in response to Vmax28

Dear Vmax28,


as I wrote in a previous post, in my case the issues seems to be generated by SMB3, so I'm currently using SMB2 which works fine exactly as CIFS (SMB1). In order to force SMB2 at max please add the following line protocol_vers_map=3 to the nsmb.conf. (if you search the internet you can get the explanation of the command)

Overall my /etc/nsmb.conf is :

[default]

protocol_vers_map=3

signing_required=no

since I disabled also signing which sometimes might slow down the smb protocol.

I do not care for the lower security since I use smb only inside the firewall of my company or at home with my NAS. For additional info on samba signing there is an Apple application note.


I hope it might help.

Jan 24, 2018 9:13 AM in response to KostaMorozov

KostaMorozov wrote:


Confirm the problem and confirm suggested resolution.

replacement smb:// to cifs:// allow to play with files and folders on windows server


Details:

macos 10.13.2 with latest update

Windows server 2004

finder and disk order as a file managers


10.13.3 has come out and is supposed to have fixed the problem.

I have installed it but since I had not experienced it on 10.13.2 I can't say.

Feb 9, 2018 5:42 AM in response to bhorsley.ad33

I had similar problems, having several finder crashes on 10.13.3, usually triggered by apple scripts that allowed me to automatically delete some desktop files, also by accessing network folders. Tried different solutions and finally tried quitting some apps, found out that everything went back to normal after quitting Goolge Backup and Sync app; so far so good. Dropbox and Box sync apps seem to work and play nice with Os. Hope this helps someone.

Dec 15, 2017 6:48 AM in response to ktm530

Then if it is not OS related that might a system and applications conflict!


Try booting in safe mode see if it happens again, and if not then narrow it down to the app creating the crash...


Otherwise a system report from https://etrecheck.com (is one to the most complete system report and quite helpful...) on your post and someone might be able to pinpoint from where the issue is coming!

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MacOS High Sierra 10.13.2 causing Finder crash

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