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macOS 26.2 enables fast AI clusters with RDMA over Thunderbolt

https://developer.apple.com/documentation/macos-release-notes/macos-26_2-release-notes#RDMA-over-Thunderbolt
82•guiand•1h ago

Comments

nodesocket•43m ago
Can we get proper HDR support first in macOS? If I enable HDR on my LG OLED monitor it looks completely washed out and blacks are grey. Windows 11 HDR works fine.
Razengan•28m ago
Really? I thought it's always been that HDR was notorious on Windows, hopeless on Linux, and only really worked in a plug-and-play manner on Mac, unless your display has an incorrect profile or something/

https://www.youtube.com/shorts/sx9TUNv80RE

heavyset_go•20m ago
Works well on Linux, just toggle a checkmark in the settings.
masspro•17m ago
MacOS does wash out SDR content in HDR mode specifically on non-Apple monitors. An HDR video playing in windowed mode will look fine but all the UI around it has black and white levels very close to grey.
Starmina•6m ago
That's intended behavior for monitor limited in peak brightness
m-ack-toddler•15m ago
AI is arguably more important than whatever gaming gimmick you're talking about.
simonw•43m ago
I follow the MLX team on Twitter and they sometimes post about using MLX on two or more joined together Macs to run models that need more than 512GB of RAM.

A couple of examples:

Kimi K2 Thinking (1 trillion parameters): https://x.com/awnihannun/status/1986601104130646266

DeepSeek R1 (671B): https://x.com/awnihannun/status/1881915166922863045 - that one came with setup instructions in a Gist: https://gist.github.com/awni/ec071fd27940698edd14a4191855bba...

pstuart•38m ago
I imagine that M5 Ultra with Thunderbolt 5 could be a decent contender for building plug and play AI clusters. Not cheap, but neither is Nvidia.
whimsicalism•32m ago
nvidia is absolutely cheaper per flop
FlacksonFive•14m ago
To acquire, maybe, but to power?
adastra22•3m ago
FLOPS are not what matters here.
baq•9m ago
at current memory prices today's cheap is yesterday's obscenely expensive - Apple's current RAM upgrade prices are cheap
jeffbee•27m ago
Very cool. It requires a fully-connected mesh so the scaling limit here would seem to be 6 Mac Studio M3 Ultra, up to 3TB of unified memory to work with.
PunchyHamster•3m ago
I'm sure someone will figure out how to make thunderbolt switch/router
novok•26m ago
Now we need some hardware that is rackmount friendly, an OS that is not fidly as hell to manage in a data center or headless server and we are off to the races! And no, custom racks are not 'rackmount friendly'.
joeframbach•9m ago
So, the Powerbook Duo Dock?
btown•24m ago
It would be incredibly ironic if, with Apple's relatively stable supply chain relative to the chaos of the RAM market these days (projected to last for years), Apple compute became known as a cost-effective way to build medium-sized clusters for inference.
andy99•20m ago
It’s gonna suck if all the good Macs get gobbled up by commercial users.
timsneath•21m ago
Also see https://www.engadget.com/ai/you-can-turn-a-cluster-of-macs-i...
geerlingguy•2m ago
This implies you'd run more than one Mac Studio in a cluster, and I have a few concerns regarding Mac clustering (as someone who's managed a number of tiny clusters, with various hardware):

  - The power button is in an awkward location, meaning rackmounting them (either 10" or 19" rack) is a bit cumbersome (at best)
  - Thunderbolt is great for peripherals, but as a semi-permanent interconnect, I have worries over the port's physical stability... wish they made a Mac with QSFP :)
  - Cabling will be important, as I've had tons of issues with TB4 and TB5 devices with anything but the most expensive Cable Matters and Apple cables I've tested (and even then...)
  - macOS remote management is not nearly as efficient as Linux, at least if you're using open source / built-in tooling
To that last point, I've been trying to figure out a way to, for example, upgrade to macOS 26.2 from 26.1 remotely, without a GUI, but it looks like you _have_ to use something like Screen Sharing or an IP KVM to log into the UI, to click the right buttons to initiate the upgrade.

Trying "sudo softwareupdate -i -a" will install minor updates, but not full OS upgrades, at least AFAICT.

Sanity Check Documents with Riftur

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2•jcitsme•9m ago•0 comments

Wine 11.0 RC2 – Run Windows Applications on Linux, BSD, Solaris and macOS

https://gitlab.winehq.org/wine/wine/-/releases/wine-11.0-rc2
1•neustradamus•12m ago•0 comments

GCP Error Fixing Bot

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Show HN: Tiny VM sandbox in C with apps in Rust, C and Zig

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Ask HN: Go all-in on AI Boom vs. enjoy parenthood?

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Show HN: VoiceGrab – Free voice-to-text for Windows using Groq Whisper

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Pentagon Unveils New GenAI Platform, It Flags Hegseth's War Crimes

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1•MBCook•18m ago•0 comments

Immigration Agents Are Using Air Passenger Data for Deportation Effort

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Realtime AI Videos

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Meta's New A.I. Superstars Are Chafing Against the Rest of the Company

https://www.nytimes.com/2025/12/10/technology/meta-ai-tbd-lab-friction.html
3•bookofjoe•30m ago•2 comments

What kind of person is DeepSeek's founder, Liang Wenfeng?

https://lmsherlock.substack.com/p/what-kind-of-person-is-deepseeks
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Closures as Win32 Window Procedures

https://nullprogram.com/blog/2025/12/12/
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WebKit Features for Safari 26.2

https://webkit.org/blog/17640/webkit-features-for-safari-26-2/
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https://ariadne.space/2025/12/12/rethinking-sudo-with-object-capabilities.html
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https://speckjs.dev/
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How long does it take to get an EIN?

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Can a slow-release bolus crack methane reduction for pasture raised cattle?

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Runmat

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https://www.youtube.com/watch?v=1fZTOjd_bOQ
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Footage appears to show aircraft larger than football field soaring over Calif

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Living Particle System

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DNS

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Radiance Meshes for Volumetric Reconstruction

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Newly launched document-to-portfolio-website, would love to get some feedback

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Referral to coach for fundraising for pre-revenue seed capital?

3•FWKevents•57m ago•1 comments

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https://www.cnbc.com/2025/12/11/stock-market-today-live-updates.html
2•MilnerRoute•59m ago•0 comments