Having trouble sharing files between Vista and Mac OSX?

One of the new default Vista security policy settings needs to be adjusted

For Vista Ultimate:

Start,Run secpol.msc [enter]

Click on Local Policies then Security Options

Navigate to
Network Security: LAN Manager authentication level
double-click to display Properties.

The default Windows Vista policy is NTVLM2 responses only.
Use the drop-down arrow to change this to

LM and NTLM – use NTLMV2 session security if negotiated

For Vista Home Premium:

Open a cmd prompt “as administrator” and ack the prompt

Type regedit [enter]
Navigate to


If it doesn’t already exist, create a DWORD value named LmCompatibilityLevel

Set the value to 1 and reboot

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