SMB Performance on macOS

Over the last couple of months I’ve been fighting some performance issues with SMB shares on my Macbook. After trying a pile of things the solution was to create the following file.

/etc/nsmb.conf

And then toss the following contents into that specific file;

[default]
mc_on=yes
mc_prefer_wired=yes
signing_required=yes

I gave my machine a reboot and now I’m copying files into the file server at an appropriate clip instead of hours to move a gig or two up there.

I’m posting this here for my own reference more than anything else. If you happen to be looking at this some time later down the line and it’s of help you are more than welcome. Otherwise – message to future me, do this to fix the performance issues on your system(s) running macOS.