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 27, 2018 4:56 PM in response to lfuller105

I see for myself that it looks like it works now. Seems a little slower than what I am used to, but I haven't tested much - it's Saturday and I don't really want to think about VPN or work... but hopefully it really isn't slower. Slower meaning it seemed like it took longer than normal to save large files or transfer files to my local machine (ie to my Desktop).

Mar 18, 2018 8:57 AM in response to lfuller105

I'm currently running MacOS 10.13.3 on a brand new 2015 13" MacBook Pro (purchased brand new a month ago) and having a similar problem. I've never experienced this in the past. I have an updated my logmein hamachi instance where I connect to one of my servers via Samba (smb://) and it connects as expected, but the issue arrises when I go to copy a file in either direction. MacOS has a kernel panic and crashes 100% of the time.


I've tried this using cifs:// as well and the issue remains. This is a bit frustrating as moving files is part of my workflow and currently I can't do anything useful since High Sierra crashes. Any resolve from Apple would be great! A lot of us are dedicated Apple customers for many years and We'd love some feedback / advice here.


Thank you,


Leo

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MacOS High Sierra 10.13.2 causing Finder crash

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