To mount your DNS-323 on OS X, do the following on the command line.
mkdir --parents /Volumes/dns323
mount -t smbfs -o nodev,nosuid //username:password@192.168.1.20/Volume_1 /Volumes/dns323/
To fix the error: "mount: realpath /Volumes/dns323: No such file or directory", create the destination mount directory using mkdir.
mkdir --parents /Volumes/dns323
Posted Oct 28, 2013.
https://www.darklaunch.com/2013/10/28/mount-dns-323-on-os-x.html