Ok, I found the files.
But if follow the instructions from IP Address from the Local Network (
https://www.pokertracker.com/guides/PT4/tutorials/postgresql-server-hosted-on-a-local-network#ip-address-for-the-local-network), I receive this:
OSX: ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
options=3<RXCSUM,TXCSUM>
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 ::1 prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=2b<RXCSUM,TXCSUM,VLAN_HWTAGGING,TSO4>
ether 58:b0:35:f2:38:d3
media: autoselect (none)
status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 58:b0:35:73:1c:3c
inet6 fe80::5ab0:35ff:fe73:1c3c%en1 prefixlen 64 scopeid 0x5
inet 192.168.2.52 netmask 0xffffff00 broadcast 192.168.2.255
inet6 2003:62:460d:c101:5ab0:35ff:fe73:1c3c prefixlen 64 autoconf
inet6 2003:62:460d:c101:353c:dd48:6c0a:6251 prefixlen 64 autoconf temporary
media: autoselect
status: active
p2p0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 2304
ether 0a:b0:35:73:1c:3c
media: autoselect
status: inactive
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
lladdr d8:30:62:ff:fe:ec:44:e8
media: autoselect <full-duplex>
status: inactive
vmnet1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:50:56:c0:00:01
inet 192.168.212.1 netmask 0xffffff00 broadcast 192.168.212.255
vmnet8: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:50:56:c0:00:08
inet 192.168.185.1 netmask 0xffffff00 broadcast 192.168.185.255
There are three lines with 192.168.x.x in it - in these, the third digit is "2", "212" and "185" - none of them is a "0" or a "1" desired in the article.
So, what do I have to do now?
(Sorry for asking possibly stupid questions)