Guide: Clearing DNS Cache in macOS Catalina: Tips and Tutorial
If you are a macOS user and have recently made changes to your DNS settings then it is a good idea to do a flushing aka cleaning the DNS cache. But why is it important to clear the DNS cache? Well, simply because when your DNS is cached, nameservers or domain name may not resolve to the correct IP address and lead you to a cached website or, in the worst case, it may fail to connect can bring you the app all the way. In this post, I’ll show you how to clear and reset the DNS cache on your macOS Catalina (also works for Mojave). Let’s check it out. Launch the Terminal app. You can do this quickly by running this keyboard shortcut Command + Space. Then type Terminal and hit Enter. Copy the following command to Terminal and hit return. sudo killall -HUP mDNSResponder; sleep 2; Enter your macOS password and hit return again.
Exit Terminal with the keyboard shortcut: Command + Q.
That’s it, it’s that simple. Your DNS cache should now be cleared. If you’re now using older versions of macOS, targeting the mDNSResponder process using the above command may not work. Check out this post for commands on clearing DNS cache on older versions of macOS.
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