If you want the “admin” group to map to the NT “Directory Admins” group, the best way is to use dscl(1) to set the SMBSID or SMBRID attributes on the “admin” group record to 500. If there is no SMBRID attribute then open the appropriate group, enable inspector and create an attribute called SMBRID. You can give it a value that corresponds to the table below:
http://www.afp548.com/article.php?story=200608252114039&query=PDC%2Bgroups
PS – Thanks Joel!
