Macbook 12 inch

Are you getting this message when you try to use the internet on your Mac: "Another device on the network is using your computers IP Address.If you continue to have problems, change the IP Address of this computer or the IP address of the other device"?

If so, you may need to assign a new lease or reset the location of your Wi-Fi. Here's how.

How to check the Wi-Fi settings on your Mac

The first thing you should check is whether your Wi-Fi settings are correct.

  1. Click on the Apple icon () in the upper left corner of your screen.
  2. Select System Preferences... from the dropdown menu.

    Opening Systems Preferences on Mac

  3. Click on Network.
  4. Check that Location is set to automatic. If it is not:

    Choosing the network settings on Mac

    a. Click the dropdown menu next to Location.

    b. Select Automatic.

    Reseting the location of your Wi-Fi settings on Mac

  5. Click the Advanced... button at the bottom right of the Network window.

  6. Click on TCP/IP.

    Selecting TCP/IP on Mac

  7. Make sure Configure IPv4 shows Using DHCP. If it does not:

    a. Click the dropdown menu next to Configure IPv4.

    b. Select Using DHCP.

    Check for Using DHCP on Mac

  8. Make sure the first Router line shows an address. If it is blank, restart your router.

    Check for router on Mac

  9. Make sure Configure IPv6 shows Automatically. If it does not:

    a. Click the dropdown menu next to Configure IPv6.

    b. Select Automatic.

  10. Click OK to save the changes.

    Checking IPv6 on Mac

How to get a new IP address on your Mac

Once you've made sure your settings are correct, you can get a new IP address to force the router to forget the IP address your Mac is currently using.

  1. Click on the Apple icon () in the upper left corner of your screen.
  2. Select System Preferences... from the dropdown menu.

    Opening Systems Preferences on Mac

  3. Click on Network.
  4. Click on Advanced.

    Selecting advanced Wi-Fi on Mac

  5. Click on TCP/IP
  6. Click the Renew DHCP Lease button.
  7. Click OK to save the changes.

    Renew DHCP Lease on Mac

This will give your computer a new address instead of trying to use one that is already assigned to a different device.

What if a new IP address doesn't work?

If you still see the same message that another device on the network is using your computers IP address, you can turn your Wi-Fi off and on again to reset the system.

  1. Click on the Apple icon () in the upper left corner of your screen.
  2. Select System Preferences... from the dropdown menu.

    Opening Systems Preferences on Mac

  3. Click on Network.
  4. Click on the Turn Wi-Fi Off button.

    Turning of Wi-FI on Mac

  5. Click on the Turn Wi-Fi On button.

    Turning on Wi-Fi on Mac

Any questions?

There are a couple of different reasons why your computer might be sharing an IP address with another device. If the steps above don't work, post your issue here and we'll try to help.