Apple Quietly Kills the 512GB Mac Studio

Between March 4 and March 6, Apple's $9,499 Mac Studio with 512GB of unified memory vanished from the online store. No announcement, no press release, no explanation on the product page. The configuration simply stopped being available for purchase.

The M3 Ultra Mac Studio now maxes out at 256GB — and even that configuration shows estimated delivery dates stretching into May. Apple also raised the price of the 256GB upgrade from $1,600 to $2,000. The 512GB option, when it existed, cost $4,000 on top of the base price.

What's Behind It

The culprit is a global DRAM shortage, and it has nothing to do with consumer demand. Memory manufacturers have been shifting production capacity toward HBM (High Bandwidth Memory) — the specialized chips used in data center AI accelerators like NVIDIA's H200. HBM commands higher margins, so chipmakers are prioritizing it. The result: less traditional DRAM available for consumer products, and what remains costs significantly more.

Apple isn't the only company affected. Framework has raised laptop prices. Raspberry Pi has hiked prices twice. Valve delayed both its Steam Machine console and Steam Frame headset. Tim Cook acknowledged the pressure directly during Apple's Q1 2026 earnings call, warning that memory pricing "could eat into margins later this year."

But the Mac Studio hit feels different. Apple's Ultra chips are the only consumer silicon supporting more than 128GB of RAM — the M4 and M5 Max top out at 128GB, the Pro at 64GB, the base chips at 32GB. The 512GB configuration was unique in the market. Nothing else came close for running large language models on a single desktop machine.

Why the Local AI Community Is Angry

The r/LocalLLaMA post about the discontinuation pulled 247 upvotes and 84 comments, most of them some variation of disbelief. The 512GB Mac Studio was THE machine for running frontier-scale models locally — large enough to fit a 400B+ parameter model entirely in memory with no quantization tricks.

Just two days ago, we published a comparison of two DGX Sparks versus a Mac Studio that tested the 512GB configuration head-to-head against NVIDIA's new hardware. That machine is now effectively unobtainable new.

Apple did ship one potential workaround. macOS Tahoe 26.2 added a Thunderbolt 5 cluster feature that pools memory across multiple Macs. In theory, you can now get 512GB by linking two 256GB Mac Studios together. In practice, that means buying two machines instead of one — and dealing with networking overhead that wasn't there before.

What's Next

Apple also quietly confirmed that the Mac Pro has been discontinued entirely, with no future models planned. The M5 Ultra Mac Studio is expected later in 2026, but there's no guarantee it will ship with a 512GB option if the DRAM shortage persists.

For anyone building a local AI rig today, the options are narrowing. The GPU market is shifting in interesting ways, and new entrants like the Intel Arc Pro B70 offer alternatives for specific workloads. But nothing replaces 512GB of unified memory in a single box. That product may simply not exist for a while.