The changes should take effect immediately. In Terminal, type sudo killall -HUP mDNSResponder followed by Return to clear your Mac’s DNS cache and prevent any clashes between DNS and the Hosts file.Use the Return key to create some space below the existing records.All you need to do to input your own TCP/IP is to follow the same format: As you can see, some of the TCP/IP addresses are already reflected in here against localhost and broadcasthost titles. Now you’ll notice you’re in the Nano text editor, from where you can actually edit Mac’s Hosts file. Type sudo nano /etc/hosts and press Return.To open Hosts file on Mac, which is hidden, you need to use Terminal: To edit Hosts file Mac features is not a difficult although completely non-obvious process. Now let’s discover how we can actually change Hosts file on Mac. You can also use Hosts file on Mac to block adware and spyware websites, and even some time-wasting ones (e.g. This can be necessary when you want to test a new website you’re developing locally, or a new development server altogether. There are instances when you don’t want the domain name to go to the actual TCP/IP, but would much rather write down your own. Having said that, there are instances when you don’t want the domain name to go to the actual TCP/IP, but would much rather write down your own. ), it pings the domain server, which in turn translates the requested domain into the TCP/IP format, and only then connects as to be able to display it. However, no one would ever want to remember all those TCP/IP numbers, and that’s why the Domain Management System (DNS) was created.Įvery time you put in a URL in your browser (e.g. 155.135.55.81) - that’s how your browser is actually able to find the website you want. Any website on the internet has a standard numeric TCP/IP address (e.g. Hosts file is a hidden gem on your Mac that lets you override DNS settings exactly as specified.

One of the unique tasks that can be easily controlled through Terminal is configuring your Mac’s Hosts file. Terminal allows you to perform nearly every function you normally use your mouse for: navigate folders, change preferences and settings, execute commands, etc. You might have even already used the key Unix-like tool in your Mac’s arsenal - Terminal. Why is having a more open system such a big deal? Simply, controlling macOS programmatically speeds up lots of everyday tasks and reveals lots of functionality that is otherwise completely inaccessible through a regular graphic interface.

How to check mac hostname