Mac Studio (2025) · M3 Ultra 32-core CPU / 80-core GPU · 512GB · 2TB · Used, Grade A
Mac Studio (2025) · M3 Ultra 32-core CPU / 80-core GPU · 512GB · 2TB · Used, Grade A
Pickup available at AIC Hardware, Framingham
Usually ready in 24 hours
A Mac with room for very large local models. Apple's M3 Ultra with a 32-core CPU, 80-core GPU and 512GB of unified memory. Used, in Grade A condition, with the original box.
Want both as a cluster?
Two Mac Studios, fully assembled in one rack, with 1TB of unified memory.
Request a quote
Why you'll love it
- 512GB unified memory: the CPU, GPU and Neural Engine share one 512GB pool at 819GB/s. Apple says that with up to half a terabyte of unified memory, you can run LLMs with hundreds of billions of parameters entirely in memory, on one machine.
- A configuration Apple no longer sells: Apple removed the 512GB memory option for Mac Studio in March 2026.
- Built to cluster: six Thunderbolt 5 ports at up to 120Gb/s. Starting in macOS 26.2, Apple supports RDMA over Thunderbolt 5, which MLX uses to spread one model across several Macs.
- M3 Ultra power: 32-core CPU with 24 performance cores, 80-core GPU with hardware-accelerated ray tracing, and a 32-core Neural Engine.
- Pro connectivity: 10Gb Ethernet, HDMI 2.1, two USB-A ports, an SDXC card slot and support for up to eight displays.
AI on this Mac
With 512GB of memory, this Mac runs everything our smaller Macs run, plus models too large for a laptop. Measured on Mac Studios with this configuration:
- Qwen 3.8 Flash-Next: 193GB peak memory, 26 tokens per second
- GLM 5.3 Flash: 352GB peak memory, 20 tokens per second
Buy both and they can run the largest models we list, split across the two over Thunderbolt 5: GLM-5.3 at 20 tokens per second and DeepSeek V4.1 Flash at 34.
Good for serving a team from one machine, and for long documents and agent work on larger models.
Comes with a free Izuran Pro license. Izuran Pro is our own AI software. We preinstall it as an early preview, and you can update it when new versions come out.
See which Mac runs which model · About Izuran · See the server kit
Condition
Grade A (Excellent), used. Used for a few months in the AIC Lab for local AI research. Like-new condition, with the original box. How we grade
Specs
| Model | Mac Studio (2025) |
|---|---|
| Model identifier | Mac15,14 |
| Chip | Apple M3 Ultra, 32-core CPU (24 performance, 8 efficiency), 80-core GPU, 32-core Neural Engine |
| Memory | 512GB unified memory, 819GB/s bandwidth |
| Storage | 2TB SSD |
| Display support | Up to eight displays at up to 6K 60Hz, or four displays at up to 8K 60Hz |
| Rear ports | 4x Thunderbolt 5 (USB-C, up to 120Gb/s), 2x USB-A (up to 5Gb/s), HDMI 2.1, 10Gb Ethernet, 3.5 mm headphone jack |
| Front ports | 2x Thunderbolt 5 (up to 120Gb/s), SDXC card slot (UHS-II) |
| Wireless | Wi-Fi 6E, Bluetooth 5.3 |
| Color | Silver |
| Size | 3.7 x 7.7 x 7.7 inches (9.5 x 19.7 x 19.7 cm) |
| Weight | 8.0 lb (3.64 kg) |
Specs from Apple's technical specifications. 512GB and clustering details from Apple's Mac Studio announcement and Apple's RDMA over Thunderbolt note. Removal of the 512GB option reported by MacRumors.
In the box
Mac Studio and power cord, in the original Apple packaging.
The Mac on its own
You're buying the Mac with macOS and a free Izuran Pro license. Installed models, the rack and AIC support aren't included. Want a private AI server set up for your office? See the Private Mac AI Server Kit.
Prepared for you
Before it ships, it's erased, with Activation Lock and remote management off. Then we install Izuran Pro, and you set the Mac up with your own Apple Account. How we prepare every Mac
Two units available. Want both as one system? See the AIC Cluster Rack and request a quote.