LucyRTL8125Ethernet

A macOS driver for Realtek RTL8125 2.5GBit Ethernet Controllers

Key Features of the Driver

Supports all versions of Realtek's RTL8125 2.5GBit Ethernet Controllers found on recent boards.
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 over IPv4 and IPv6.
Support for TCP/IPv4, UDP/IPv4, TCP/IPv6 and UDP/IPv6 checksum offload.
Supports jumbo frames up to 9000 bytes (strongly recommended for 2.5GBit operation).
Fully optimized for Catalina. Note that older versions of macOS might not support 2.5GB Ethernet.
Supports Wake on LAN (untested).
Supports VLAN (untested).
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.

In case you are looking for a prebuilt binary or need support, please see the driver's thread on insanelymac.com:

Support requests here on GitHub will be ignored!