On Windows 10/11

1️⃣ Open Network Settings

• Press Windows + R.

• Add the below command in your command prompt:

  ncpa.cpl

• Press Enter.

• This will open the Network Connections window.
  

2️⃣ Right-click on Active Network Adapter

• Right-click on your active Ethernet or Wi-Fi adapter

• Select “Properties”.
  

3️⃣ Disable IPv6

• In the Networking tab, scroll down and uncheck the box next to:
  "Internet Protocol Version 6 (TCP/IPv6)"

• Click OK to save the changes.
  

IPv6 is now disabled on your Windows system.

On macOS

1️⃣ Open System Settings

• Go to Apple Menu → System Settings (or "System Preferences" on older macOS versions).

• Select “Network” from the sidebar.
  

2️⃣ Choose Your Network Interface

• Click on Wi-Fi or Ethernet (whichever you are using).

• Then click “Details…” or the Advanced button.
  

3️⃣ Go to TCP/IP Tab

• Navigate to the TCP/IP tab.

• Under Configure IPv6, select:
  “Link-local only” or “Off” (if available).
  

• Click OK and then Apply to save changes.

IPv6 is now limited or disabled on macOS.

Notes
On macOS, fully disabling IPv6 via the UI may not be possible in all versions. In such cases, you can use the terminal with networksetup commands.
Disabling IPv6 may affect some services. Make sure you test your network applications afterward.