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I'm setting up a new Windows Server 2008 x64 file server. For Windows workstations everything works as it's supposed to but for OS X workstations it takes more than 30 seconds to even connect to the server. The funny part is that when the connection is established, everything works smoothly.


  • On our old Windows Server 2003 file server there is no such a problem

  • If I use & mount, the connection is established instantly

  • I've tried googling the problem (of course) and tried stuff like disabling SMB 2.0 on the server side but without success

Has anyone else bumped into this problem and found a solution?

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Having the exact same problem :/ – Aron Rotteveel May 18 '11 at 13:58

The smells heavily of a DNS issue (30 second timeout, then working). I would install wireshark and take a look at what the OS X system is trying to do for that 30 second window. My bet is on DNS of some kind.

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Oh, I should have mentioned this too: if I use server's ip to connect it's still slow. – Everything's ruined Oct 22 '09 at 13:47
Doesn't really rule out a DNS problem -- who knows if Mac OS X is trying to do a reverse and DNS and your DNS servers arn't responding, or it's ignoring the response for some reason. Best to get a packet capture anyway. – Kyle Smith Oct 22 '09 at 14:11

I found that when you click Go -> Connect to Server and put in smb://server/share it takes about 19 seconds to bring up the logon prompt.

If I click Go-> Connect to Server and put in smb://server:139/share it takes about 4 seconds to get the logon prompt.

Give this a try and see how it goes.

Adrian Page

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Don't know if this works for 10.5 but on 10.6 it doesn't :( – Everything's ruined Nov 23 '10 at 9:25

I totally forgot about this thread but after I recovered my account to comment another thread I remembered.

The solution was to create a file /Library/Preferences/ with content:


You need to restart os x before it has any effect.

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Any resolution to this one? assuming it's a DNS issue, what is the resolution? Is it simply that the proper reverse dns entries don't exist and need to be created?

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I can't +1 this because I am new here. Someone please +1 this for me, as I too am having this annoying problem.

A network trace does show a few bits of DNS traffic taking 30 seconds...

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