Jeff Geerling • 7/31/2026

Getting 25 Gbps Thunderbolt Ethernet on my Mac Studio

This article details the author's journey to achieve 25 Gbps Ethernet on a Mac Studio using a budget-friendly Thunderbolt 3 adapter for an OCP 2 NIC, contrasting with expensive commercial options like Sonnet and Atto. The author tests performance with iperf3, hitting 20 Gbps single-direction due to Thunderbolt 3 limits, and addresses overheating problems by adding heatsinks and a USB fan. The post includes practical tips for cooling and performance optimization, making it useful for tech enthusiasts seeking high-speed networking on Macs without breaking the bank.

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#Network Adapter #25gbps #Thunderbolt Ethernet