Troubleshooting Realtek RTL8139/810X Ethernet Adapter on macOS: Using RealtekRTL8100.kext for Hackintosh

For Realtek RTL8139/810X Fast Ethernet Adapter support on macOS, you can try using the RealtekRTL8100.kext. While it might be listed under 'Legacy' kexts, it doesn't necessarily mean it won't work with newer versions of macOS, and many users have reported Success with it.

Here are the steps you can take:

1. Download the Kext:

   • Obtain the RealtekRTL8100.kext from a reliable source. You can find it on GitHub or other Hackintosh forums.

2. Install the Kext:

   • Copy the RealtekRTL8100.kext to the /EFI/OpenCore/Kexts directory if you're using OpenCore, or /Library/Extensions if you're using Clover.

3. Update Kext Cache:

   • Open Terminal and run the following commands:

     bashCopy code
     sudo chown -R root:wheel /Library/Extensions/RealtekRTL8100.kext
     sudo chmod -R 755 /Library/Extensions/RealtekRTL8100.kext
     sudo kextcache -i /
     

4. Reboot:

   • Restart your Hackintosh.

5. Check Network Settings:

   • After rebooting, check your network settings to see if the RTL8139/810X adapter is recognized and working.

Keep in mind that compatibility can vary, and in some cases, you might need to try different kexts or patches. Additionally, ensure that you have the necessary bootloader (OpenCore or Clover) configurations for proper kext injection.

If the RealtekRTL8100.kext doesn't work as expected, you might also consider looking into the Mieze's RealtekRTL8111 kext, which supports a broader range of Realtek network adapters.

Remember to back up your system before making significant changes, and always refer to the official documentation and forums for the most up-to-date information.