Mac OS X

Open system preferences and click on Network under Internet & Wireless.

step1

If your Mac is connected through a wireless network, select AirPort. Otherwise select Ethernet.
Then, click on the  Advanced… button.

step2

Click on DNS at the top of the screen.

step3

Fill in the DNS servers below:

 

Important

Only adfreetime.com DNS servers should be used. If you had other DNS servers before, remove those using the – sign.

 

Flush DNS cache

Flushing the DNS cache in Mac OS X is an easy process, but the steps taken will depend on which version of OS X you are running.

Yosemite & El Capitan

If you are running Mac OS X 10.10.4 and above, you need to do the following:

  1. Open up the command terminal.

    (Press +space and type terminal)
  2. Run the command sudo killall -HUP mDNSResponder

If you are running Mac OS X 10.10, you need to do the following:

  1. Open up the command terminal.

    (Press +space and type terminal)
  2. Run the command sudo discoveryutil udnsflushcaches

Maverics, Mountain Lion or Lion

If you are running Mac OS X 10.7 or 10.8, you need to do the following:

  1. Open up the command terminal.

    (Press +space and type terminal)
  2. Run the command sudo killall -HUP mDNSResponder

Snow Leopard

If you are running Mac OS X 10.6, you need to do the following:

  1. Open up a command terminal.

    (Press +space and type terminal)
  2. Run the command dscacheutil -flushcache

Leopard and below

If you are running Mac OS X 10.5.1 or below, you need to do the following:

  1. Open a command terminal.

    (Press +space and type terminal)
  2. Run the command lookupd -flushcache

 

Note

You should also clear your browser cache. Here is a guide for the most popular browsers:


Clearing the DNS Cache on Browsers

The following table provides instructions for clearing the DNS cache on popular Internet browsers.

Mozilla Firefox

  • Go to the Tools menu, select Clear Recent History and check all boxes.
  • Under Time range to clear select Everything (except passwords, if desired) and click Clear Now.
  • Apple Safari

    Go to the Safari menu, select Reset Safari, check all boxes and click Reset.

    Google Chrome

  • Go to the Chrome menu, select Clear Browsing Data and check all boxes (except passwords, if desired).
  • Under Clear data for this time period, select Everything and click Clear Browsing Data.
  •  

    Note

    If you are asked for a password when you enter one of the above commands, enter your regular user password and press enter. It’s normal to not see any input while entering the password.

    Also, the above commands will not return any output unless there has been an error. If seemingly nothing happens, you have done it right!