I want to use two networks (internet and private WAN) via Wifi. My Apple Mac can only have one IP per interface (wifi or ethernet). I had used Ethernet for private WAN and Wifi for internet so long. inconvenient.

How do I setup my main RB so I can connect to internet as well as a private 172.16.x.x WAN via Wifi?

I have 3 Routers, two of them Routerboards (RB):
- Internet Router with wifi. DHCP server active. 192.168.178.x tange IP 192.168.178.1
- RB 6.24 antenna with private wireless WAN on 172.16.x.x range. I have 5 fixed IP addresses assigned. No DHCP. It has a local 192.168.178.3 address on ethernet.
- new main RB 6.24 which should connect all of them and act as a Wifi router.

Internet Router is connected to Ether1, RB antenna to Ether10

on main RB I can see:
Addresses: 192.168.0.1/24, 192.168.178.101/24
Brige: Wifi-Bridge
Routes: 0.0.0.0 Gateway 192.168.187.1 reachable ether1
192.168.0.0/24 wifi bridge reachable
192.168.178.0/24 ether1 reachable

Private WAN:
172.26.33.8/29 my IPs
172.26.33.9-13 available
172.26.33.14 RB antenna SXT
Netmask:   255.255.255.248
Broadcast: 172.26.33.15
gateway is 172.26.33.251

I tried to add a Route 172.16.0.0/12 on ether10 but that hasn't helped yet.

So a couple of questions if you will...

This "private WAN" what IPs are you trying to reach? Will they always be in the 172.26.33.x range?

I see that you are trying to advertise a large address space of 172.16.0.0/12. Why are you advertising such a large "supernet?" Can you ping your DG from your Mikrotik? Are you running a NAT on that interface?

hi
can you make a small diagram to know what you need to do