Error: "Another device on the network is using your computer's IP address" (MacOS)

Tags macos

Issue

Follow these instructions if you receive the following error when trying to connect to CometNet on a Mac computer: "Another device on the network is using your computer's IP address".

This issue is caused most likely by the router that mistakenly assigns the same IP address to 2 different devices, you can fix this error by reconnecting or renewing your computer's DHCP lease.

Need to fix "another device is using your IP address on this network" | MacRumors Forums.

Resolution

  • Try disconnect and re-connect Wi-Fi as an initial troubleshooting step.
    • By disconnecting and re-connecting, the router will assign a new IP address to your computer.
    • Log the old and new IP address to check if they are different.
    • If they are the same, try connecting to other Wi-Fi, for example UTD Guest, and then switch back to CometNet. If the issue still persists, follow the step below.
  • Click on the Apple icon in the top left corner and select System Settings.

System Settings option in MacOS.

  • Click on the Network as shown below.

Network icon in System Settings.

  • Select the Wi-Fi network you are wanting to use, and then select Details...

Details button in Wi-Fi settings.

  • Under the TCP/IP section, click on Renew DHCP Lease and then OK.

Wi-Fi network settings.

  • Restart your Mac and connect back to CometNet. It should no longer give this error.
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