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About This File

Driver for Realtek's RTL810X Fast Ethernet family of NICs which supports these chips:

  • RTL8101E
  • RTL8102E
  • RTL8103E
  • RTL8401E
  • RTL8105E
  • RTL8402
  • RTL8106E
  • RTL8106EUS
  • RTL8107E


  • Version 2.0.0 requires Sierra (may work on El Capitan too but this is untested). Previous versions of OS X are supported by version 1.0.0.
  • 64 bit architecture only.
  • Support for multisegment packets relieving the network stack of unnecessary copy operations when assembling packets for transmission.
  • No-copy receive and transmit. Only small packets are copied on reception because creating a copy is more efficient than allocating a new buffer.
  • TCP, UDP and IPv4 checksum offload (receive and transmit).
  • TCP segmentation offload under IPv4.
  • Support for TCP/IPv6 and UDP/IPv6 checksum offload.
  • Supports Wake on LAN.
  • Support for Energy Efficient Ethernet (EEE) which can be disabled by setting enableEEE to NO in the drivers Info.plist without rebuild. The default is YES.
  • The driver is published under GPLv2.

What's New in Version 2.0.1   See changelog


  • Fixes a problem with retrieval of the permanent MAC address on some chips.
  • Requires High Sierra.

User Feedback

Recommended Comments

Performance and stability of this kext is outstanding.


Tested on

Lenovo IdeaPad Z580

02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller [10ec:8136] (rev 05)

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Tested on

Hackbook: (Chameleon 2.3-r2578) Lenovo U310 Touch, i5-3337U/HM77, Intel HD 4000 - 1366X768: OS X 10.10.2

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