Hi, clear arp-cache. To refresh dynamically created entries from the Address Resolution Protocol (ARP) cache, use the clear arp-cache. This command updates the dynamically learned IP address and MAC address mapping information in the ARP table to ensure the validity of those entries. Select Internet Protocol (TCP/IP) and choose Properties. Set your IP address according to part 1 of this guide. Set as 255.255.255.0 for small networks. A gateway is generally your router’s IP address, but with a router it’s generally better to use DHCP (auto-assigning IP addresses).

At times, Mac assigns itself an IP address, which prevents the Internet from working. Even if the computer is connected to Wi-Fi network, you won’t be able to use the Internet. To fix Internet not working error due to the self-assigned IP address on Mac, you will have to wipe out some files.

Don’t worry the process isn’t quite lengthy and works reliably. The other day, I encountered this same issue and was able to troubleshoot it by following this trick.

Internet Not Working Due to Self-Assigned IP Address on Mac: How to Fix the Issue

Step #1. Launch finder on your Mac.

Step #2. Now, click on Macintosh HD.

Step #3. Now, you need to click on the Library folder and head over to Preferences.

Step #4. Next, click on the System Configuration folder.

Step #5. Next up, you have to move the following files in the trash.

Clear Manual Ip Address Entries From A Macbook Pro

com.apple.airport.preferences.plist
com.apple.network.identification.plist
NetworkInterfaces.plist

Step #6. Finally, restart your Mac.

Note: If Macintosh HD is not available in the Finder sidebar, click on the Finder menu → Preferences → click on the “Sidebar” tab → Under “Show these items in the sidebar” click on “Hard disks.”

That’s done!

Clear Manual Ip Address Entries From A Mac

After your computer has restarted, self-assigned IP address issue will be gone, and you will be able to use the Internet without any problem.

Wrap up:

Has this tricked worked in fixing the problem? Having your feedback in the comments below would be great.

You might want to take a look at these posts as well:

Jignesh Padhiyar is the co-founder of iGeeksBlog.com who has a keen eye for news, rumors and all the unusual stuff that happens around Apple products. During his tight schedule, Jignesh finds some moments of respite to share side-splitting contents on social media.

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It's rare to change proxy settings for a small or home network. Proxies tend to be something used in school or business networks, and when there are servers that secure or that cache network traffic for the organization.

While they do have IP addresses, network proxies aren't particularly related to IP addressing itself. They're an intermediate hop and effectively a special-purpose IP router that's intentionally placed into the network path to the intended destination for your network connections of the particular protocol(s) involved.

On more recent releases than your 10.5.8, managing the proxies for the various protocols is a set of checkboxes, and unchecking those will clear all proxies. Uncheck all of those, unless you're on a network that requires proxies.

Clear Manual Ip Address Entries From A Mac Os

As for your question, please post a link to the proxy settings article you were reading, and please indicate what attributes of your network that you are resetting that 'works on and off'. If you've tweaked various settings, you'll have to find and untweak those settings, or (less desirably) delete the whole interface and re-add it.

Oct 5, 2013 7:37 AM