Ethernet is DEAD?? Mac Studio is 100x FASTER!!
NetworkChuck
Dec 20, 2025
Apple has quietly revolutionized local AI clustering by enabling RDMA (Remote Direct Memory Access) over Thunderbolt 5, reducing network latency by 100x. This software update allows developers to move beyond slow pipeline parallelism to tensor parallelism, effectively turning a cluster of Mac Studios into a high-performance machine capable of running massive, trillion-parameter models locally.
Key insight: By implementing RDMA, Apple reduced network latency from 300 microseconds to just 3 microseconds, a 100-fold improvement that eliminates the communication bottlenecks previously making multi-Mac AI clustering impractical.
