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I was setting up a brand new MacBook for a client, and when I tested the .inetloc URL for the client’s network share on one of the MacBooks I got a curious dialog box saying “…blah blah couldn’t mount blah blah unexpected error blah blah…”

I checked the system log and found this:

“kernel[0]: mount version mismatch: kernel=103700, mount=103600″

First I reinstalled Mac OS X 10.4.9 Combo Update and Security Update 2007-004, but no joy. Then I did some investigating and, Voila!, I found that the smb daemon version (in Terminal: /sbin/mount\_smbfs -v) and the smb kext version (System Profiler > Extensions > smbfs) didn’t match, the former being 1.3.6 and the latter being 1.3.7. The fix is to locate mount\_smbfs version 1.3.7 on another machine and then copy it (I used cp -Rpv) to the problem machine, repair permissions and then restart. SMB network shares now mount fine.