Some printers, like the one I have (HP 8600 Pro), have "Print-to-Folder" capability.   Unfortunately, I have no Windows server, only a FreeBSD box to print to.  I can mount folders from the FreeBSD box on my MacBook.. if I can get files to scan there.   So, to do that, I need a Samba on my FreeBSD box.  To install SMB on FreeBSD:

pkg install samba36

Then, I need a smb.conf in /usr/local/etc, that exports a folder, like this:

[global]

workgroup = khubla.local
server string = Samba Server
security = user

hosts allow = 192.168.77.
max log size = 50

passdb backend = smbpasswd

domain master = yes

; wins support = yes

[public]
 comment = Public
 path = /tank/home/public/public/
 public = yes
 writable = yes
 printable = no

So, this will expose a SMB share at smb://bernice/public.  Next I need a user account.  Firstly, a FreeBSD account:

pw useradd -n hpprinter -s /bin/csh -m
passwd hpprinter

Then the samba account

smbpasswd -a hpprinter

Finally, start samba

service samba onestart

 I can now configure the share in the printer.  The UNC path is:

\\bernice.khubla.local\public