To find a router's IP address on a Mac, open System Preferences, go to Network Preferences, select Wi-Fi and click Advanced, then select TCP/IP. The router's IP address, such as 192.168.29.1, will be displayed. Older versions of Mac OS may not show this information, but newer versions display all network details through System Preferences.

1. HOW TO FIND ROUTER IP
ADDRESS ON MAC
In this article, we explain “How to Find A Router IP Address On Mac”. If you
are using Mac O/s connected to your router. It’s very simple way to get a
router IP address by using system preference in OS.
There are following steps :
1. Go to Apple menu to open System preference
2. Put your cursor on ‘ Internet & Wireless ‘ section, Click on “ Network
Preference”
3. Select “Wi-Fi” and Click on “Advance button, it will be visible on right corner
in that window wizard.
4. Go to “Top choice” section and select “TCP/IP”
5. The router IP address will be showing in numerical such as: 192.168.29.1

2. Note:
Old versions of Mac OS X have not shown any information through system
preferences whereas new versions of OS X have shown all detailed network
data and troubleshooting.
You have multiple options to uncover the router’s IP address through Wi-Fi
menu and it only works for uncovering a router IP in a Wireless network
whether wired router or wireless network router.
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