Guys, whatever you do — don’t upgrade your 10.9 servers to a 10.10 — unless you don’t mind waiting a few minutes to open up a file share.

According to Apple’s site, Mac OS X 10.10 Yosemite runs a new SMB version 3, which is suppose to be “faster/better”, yada yada. Turns out, since 10.6, theres been many many issues with Macs and Windows machines trying to access file services via SMB or AFP. I ran into this situation first hand.

As a matter of fact, a quick google search resulted in me finding this 8 page thread on all the horrors of Mac users trying to get their file server working properly. Some fixes include reverting your Mac to run SMB version 1 by editing nsmb.conf file or by downloading this app called SMBconfig.

echo "[default]" >> ~/Library/Preferences/nsmb.conf; echo "smb_neg=smb1_only" >> ~/Library/Preferences/nsmb.conf

rm ~/Library/Preferences/nsmb.conf

Use the line aboe to remove the change we did — thanks to Mac Hints for this.

If all else fails, you’ll need to downgrade or move the file services to a different machine that isnt running Mac OS X 10.10. Mac OS X 10.9 worked fine for me.

Theres a guide off Mac World on how to do this, but at the end of the day, its just best to steer clear of 10.10!

Major face plam, Apple, Major face palm. And here I thought Macs “just worked”….not the case here. Leave the networking to the pros, Apple —  apparently networking is not your forte.




William Zambrano

William Zambrano

NYC networkers is run by William Zambrano, a passionate network engineer who has been in the IT industry for eight years who posts up blog articles, YouTube videos, and holds events in the NYC area. He lives in Queens, New York and has consulted in various different companies in the NY area. Previously William worked as a Cisco Certified Systems Instructor (CCSI) but now currently works for Arista Networks serving as a Systems Engineer. William can be reached by email at

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