Lucy2.5G.kext working with 5G controller?

filet

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AMD OS X Member
Nov 20, 2025
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CPU:
AMD Ryzen 7 9800X3D
Hi Guys,
currently setting up my EFI folder.
I have a MSI MAG x870 Tomahawk MBO with the Realtek® 8126-CG 5G LAN controller.
Can I just use the 2.5G LucyRTL8125Ethernet.kext with that?
Or wont it work like that?


Btw this is my system, if someone sees more compatability issues. Thanks in advance for the help!

CPU : AMD Ryzen 7 9800X3D 4.7 GHz 8-Core Processor
CPU Cooler : ARCTIC Liquid Freezer III 420 A-RGB 69.9 CFM Liquid CPU Cooler
MBO : MSI MAG X870 TOMAHAWK WIFI ATX AM5 Motherboard
RAM : G.Skill Trident Z5 Neo RGB 32 GB (2 x 16 GB) DDR5-6000 CL30 Memory
SSD 1 : Samsung 990 Pro 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
SSD 2 : Samsung 980 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
GPU 1 : Sapphire NITRO+ Radeon RX 7900 XTX 24 GB Video Card
GPU 2: Sapphire PULSE Radeon RX 5700 XT 8 GB Video Card
Case : Corsair 7000D AIRFLOW ATX Full Tower Case
PSU : be quiet! Straight Power 12 1000 W 80+ Platinum Certified Fully Modular ATX Power Supply
OS : Microsoft Windows 11
 
8126 is not 8125.
WiFi 7? You won't have any network with macOS. Oops!
Samsung drives do not always play nice with macOS
The 7900XTX is not supported by macOS, as you're probably aware. But then the 5700XT will be on chipset lanes rather than on CPU lanes—suboptimal… if it runs at all. This raises the question whether a dual-purpose build is really the best option over two dedicated builds: One for WIndows and one for macOS.

Can you compromise on a single 6800/6900XT "to bind them all"?
Or find an alternative motherboard with a pair of bifurcated x8/x8 slots?
 
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