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A comment on macOS 26.2 enables fast AI clusters with RDMA over Thunderbolt. Parent comment

Re:macOS 26.2 enables fast AI clusters with RDMA over Thunde... by Eggpants on Friday December 12, 2025 @07:18PM (#46250667)
Not sure I understand, Mac OS is BSD based. https://en.wikipedia.org/wiki/Darwin_(operating_system)
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Re:macOS 26.2 enables fast AI clusters with RDMA over Thunde... by bigyabai on Friday December 12, 2025 @07:47PM (#46250846)
macOS is XNU-based. There is BSD code that runs in the microkernel level and BSD tools in the userland, but the kernel does not resemble BSD's architecture or adopt BSD's license.

This is an issue for some industry-standard software like CUDA, which does provide BSD drivers with ARM support that just never get adopted by Apple: https://www.nvidia.com/en-us/drivers/unix/

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Re:macOS 26.2 enables fast AI clusters with RDMA over Thunde... by 7e on Friday December 12, 2025 @09:25PM (#46251428)
If there were TCO advantages with this setup, CUDA would not be a blocker.
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Re:macOS 26.2 enables fast AI clusters with RDMA over Thunde... by bigyabai on Friday December 12, 2025 @11:39PM (#46252033)
CUDA's just one example; there's a lot of hardware support on the BSDs that Apple doesn't want to inherit.
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Re:macOS 26.2 enables fast AI clusters with RDMA over Thunde... by ngcc_hk on Saturday December 13, 2025 @12:54AM (#46252388)
Why maint other and have baggage ?
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Re:macOS 26.2 enables fast AI clusters with RDMA over Thunde... by bigyabai on Saturday December 13, 2025 @01:08PM (#46256539)
Because Apple already does...? There's still PowerPC and MIPS code that runs in macOS. Asking for CUDA compatibility is not somehow too hard for the trillion-dollar megacorp to handle.
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