June 29, 2017 Mac Bug Connecting to Non-Apple SMB Shares
Set my folders free!
Earlier this year we received a number of reports from users that were unable to delete, move or rename documents on a new SMB file share. Eventually we were able to narrow it down enough to be able to consistently duplicate what they were seeing. It appears the SMB client in Mac OS X (10.11, 10.12 and possibly others) is overly aggressive with file locks.
Here is a movie of the bug in action. Many of the Mac administrators we reached out to for confirmation claimed they didn’t see it, until they followed our steps.
The bug seems specific to non-Apple SMB shares (we see it with Microsoft Server 2012r2), we can’t replicate it with OS X Server SMB shares.
Turning on/off Finder previews has no effect. Our machines are not bound to Active Directory. We have confirmed with other institutions that have their clients and server bound to Active Directory and they see the same issue.
We’ve notified Apple and Microsoft about the issue. We have been informed this is an Apple issue, but we have no timeline to share for a fix. We hope Mac OS 10.13 High Sierra will include it.
For 10.13, can you try disabling FileIDs (in /etc/nsmb.conf ) until you can deploy macOS Mojave?
Let us know if this works around the issue in High Sierra.