Connecting to network

If I enter incorrect Domain name system , and click on ok then ? DNS setttings are typed manually by clicking on plus sign , they will not get automatically saved if I delete them by clicking on minus sign

Why does DNS matter?

The Domain name system (DNS) protocol is an important part of the web's infrastructure, serving as the Internet's phone book: every time you visit a website, your computer performs a DNS lookup. Complex pages often require multiple DNS lookups before they start loading, so your computer may be performing hundreds of lookups a day.

And come to first window and click on apply , the network will not be joined .

I meant that location should be automatic , no proxies are to be set a single incorrect settings will stop the Mac to join network or searching the network .

Thanks !!

If you network settings are correct no outsource network ( like open network ) can be joined to your network , some settings are to be done like WPA2 Personal settings , the wireless network password is saved in keychain and in network settings see this old thread how to join the network correctly , even you delete the whole settings multiple times and then join it correctly with all credentials 10.13.3 wifi issue (doesn't automatically connect)

Hello !

Ckuan

Is only remember network this computer has joined box is only the settings to be checked and Mac will be joined automatically .

What about other settings like correct DNS , password .. etc , if all other settings are set incorrectly or even a single setting is done incorrectly will the Mac joined to network " no " as every settings as his own importance .

Check menu

 >

System Preferences... >

Network > Show Wi-Fi status in menu bar (selected) >

Advanced... >

Remember networks this computer has joined (selected)

In addition to the above, in the same place, drag your desired network to the top of the list.

The operational word is "Remember networks this computer has joined"

DNS is DNS and should be auto.

FWIW, You don't need to use Google DNS.

But why , I don't use open DNS settings .

Who knows, DNS don't change itself.

Your provider normally do not use Google DNS.