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We have been using this router Peplink Balance One at the location for almost 3 years. The configuration has not change. Is it possible there is a second DHCP server on the network? Did a wireless access point get added with DHCP enabled?

Mac OS X Fixit - How to fix wireless wifi problems on mac computers

We will take a look tomorrow to make sure no one has connected anything directly to the router. Are there other possible causes that would result in the router attempting to give out duplicate IP addresses?

If this MAC address belongs to one of your equipment

We have not been able to do the ARP test yet. We did confirm there were no other devices connected to the router other than our wireless access points. Even after the DHCP reservation, he continues to get that error message screen shot attached and his computer bounces between active and inactive on the Client List screen. We have fixed the issue by replacing a WiFi AP that was connected directly to the router and was a wireless bridge to the rest of our network. Here is what we found -. The last three should be listed in your network System Preference and will be the same on all devices only the IP address must be different.

Record the subnet mask, gateway and DNS servers. Then fill that info in on all devices. It would be a good idea, if you do this, to make a note of all the settings and which device gets which address. Keeping track can be a pain, which is why we have DHCP.

Helpful answers

It is supposed to hand out all that info automatically. Check on your router which other computer or phone is using your IP address. Note your actual address, let's say it is Just check that this equipment is actually within reach of your router and make it renew its DHCP lease.


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  • If the same IP address is regularly attributed to 2 different equipments connected through Wi-Fi, this may be caused by a poor quality wireless connectivity. Here is the scenario which might be at play:.

    By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. Home Questions Tags Users Unanswered. Ask Question. Our internet router often stops working at home, but for the the second time only I have got a pop-up error saying: What fixed your initial problem? Changing the ip address as explained above fixed the problem of "another device is using your ip address".

    “Another device on the network is using your computer’s IP address” Mac Error Fix

    But the router continues to stop sending wifi signal quite often. So your problem isn't really fixed, is that right? What make you think your wireless router stops sending signal?


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    • Resolved - Another device on the network is using your computer's IP Address | MacRumors Forums?
    • Correct, the real problem is not fixed. The wifi connection will be lost and then the wifi network will not be in the list of available wifi networks.

      Unplugging the router sometimes helps but it doesn't always work for long. As far as I can remember this problem started happening when I got my new work Macbook. Any ideas?

      Another device using your computer’s IP address? Here’s the fix – MacDailyNews - Welcome Home

      Your problem looks much more like a wireless network with intermittent connectivity causing wrong DHCP attributed addresses. To help you to diagnose your problem, please provide some physical description of your wireless landscape: ALSO possible, someone unwanted is on your network.

      Change the WiFi password just in case. Failing all of that assign everything a static IP address like this Steve Chambers Steve Chambers