1. Open up System Preferences and find Network under Internet & Wireless
    Setup OS X step 1
  2. Then select either Wi-Fi or Ethernet depending on the method you use to connect to the Internet.
  3. Once selected click the advanced button on the lower right hand side
  4. Then select DNS
  5. Click the small plus on the lower left hand side
  6. Add xxx.xxx.xxx.xxx​​
  7. Remove any other DNS address
  8. Click OK
  9. Then click Apply
  10. Restart your computer