How to flush DNS cache on MacOS to improve browsing speed? step by step guide

The DNS cache is used by the computer for the purpose of remember certain user actions how the IP addresses that you use and thus be able to allow faster navigation on the web.

However, with the passage of time and accumulation of the DNS cache on the computer the opposite can be achieved, that is, your web browsing is much slower or some errors appear in it.

It is because of that flush DNS cache It is often very important since this will be what allows you improve browsing speed. In order to carry out this process, follow in detail each of the steps that we will teach you throughout the post.

What is my iMac’s DNS cache?

Every time a user browses the Internet, they end up visiting several websites in order to search for some information or visit an entertainment web page. Each of these sites usually has a IP address associated with them, but for more frequent use these IP have an associated domain to make it easier to use them, so you end up introducing for example: www.internetpasoapaso.com and not the IP address.

This is how all web browsers have a domain converter by IP address, this being what allows to open the correct page. However, in order to offer a much faster experience, all this data is stored in the Mac’s DNS cache.

So, a list is created where save the IP associated with each domain for when the users go back to said website, a much faster response can be generated. Therefore, it can be said that it works in a similar way to temporary files cache that are stored on the devices.

How to know if the DNS cache of my MacOS is full?

Usually the macOS DNS cache It usually takes too long to fill up, although clearly this will also depend on how much browse the internet. However, knowing if it is full or not is very difficult, but the best thing to do in this case is to empty it from time to time, this can be every 90 or 120 days.

A hint to know that the macOS cache is full is that the operation of your navigation begins to be affected, that is, it is much slower or you have constant problems when loading websites. In these cases it is best delete all this temporary content and start from scratch again, this will be the only thing that will allow you to eliminate all these errors produced during web browsing.

Why should I flush the DNS cache on MacOS?

The most recommended is flush DNS cache constantly since, it is a process that not done automatically but you have to do it properly Handbook.

This procedure must be carried out mainly for three reasons, which we will show you below:

• Avoid third-party security attacks: The main reason why you should empty the DNS cache is for security. Keep in mind that through this information other people can obtain your private data, this is how cybercriminals can have DNS access Y manipulate the entries to malicious websites and from there access your personal and private data.
• Hide your browsing behavior: In general, the monitoring of users on the Internet is carried out from the Cookies or javascriptbut DNS cache it remains an element that is also essential for cybercriminals to collect data.
• Troubleshoot: Over time it is possible that obsolete entries are generated, so it ends up showing the wrong websites. This means that the domain name begins to appear with the wrong or old IP address and one way to solve these problems is by emptying the DNS cache. This will update all the information so the connections work properly again.

Learn how to flush your DNS server cache on iMac

If your main goal is flush your DNS server cache on Mac and thus avoid any type of inconvenience later, so here we are going to teach you step by step how to carry out this procedure.

To do this, just follow each of the steps that we are going to indicate below:

• The first thing you should do is enter the app “Terminal” You can do this in two ways, either via LaunchPad or Spotlight (by pressing command + space bar)
• Later you will having to copy and paste the following command: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder.

• Once added, the next thing to do is press the “Enter” from your keyboard.
• Next you will have to enter your Mac passwordThis as a security measure.
• Lastly, press the key again.Enter”.

You should keep in mind that the command employee may vary depending on the operating system that you use

That is why here we leave you a list with the commands used in several of the MacOS OS:

• Mac OS Sierra and High Sierra: sudo killall -HUP mDNSResponder
• Mac OS X El Capitan: sudo killall -HUP mDNSResponder
• Mac OS X Mavericks: dscacheutil -flushcache;sudo killall -HUP mDNSResponder
• Mac OS X Yosemite: sudo discoveryutil mdnsflushcache;sudo discoveryutil udnsflushcaches;say flushed

Therefore, in this simple way you can start clear the entire DNS cache of your MacOS computer. Keep in mind that this will remain as it was at the beginning, so the system will ask everything again. It is a very easy process to execute and which you must do constantly.