Mac OS X Server 10.4: Group members can‘t save to a CIFS share

When using certain applications, group members cannot save to a CIFS share; they get a permissions error.

This happens on volumes that don't have ACLs enabled. The solution is to either enable ACLs or to disable the ACLs in /etc/smb.conf. Follow the steps below to disable the ACL support for the shares in question.

1. Open /etc/smb.conf in a text editor. The file is owned by root so you need to either use sudo or log in as root.
2. Find the section for the relevant share. For example, if the share is named "Share", there will be a section named "[Share]" in the file.
3. Look for the line in the share section containing "vfs objects = darwin_acls".
4. Remove "darwin_acls" from the line so it looks like this:
   

   vfs objects =

5. Save the file.
6. Stop and Start the CIFS server.