You can create NFS export from GUI.   1) File Sharing > NFS > Add Export  2) Under "Access Control": a) Credential mapping: "Map root users" b) User name: nobody  This is the default; however in a basic configuration, if I am correctly assuming what you are trying to accomplish, you can change this to: root.  Another thing you can do instead and may or may not be the right choice is to instead change the owner of the directory to: nobody (via File Explorer or chmod), but I simply bring up the latter example of how the 2 options related to each other.  How to Mount from MAC ?  Mac OS X: Using the Finder to Mount NFS Exports
How to add NFS share in Isiolon. Also let me know how to mount NFS share in Mac.
How to add NFS share in Isiolon. Also let me know how to mount NFS share in Mac.