AI station / mini-PC

Mac Studio (M5 Ultra, 512 GB) — Local LLM Performance

Mac Studio (M5 Ultra, 512 GB) is a Desktop running macOS, with 512 GB unified memory.

Specifications

Memory for models
512 GB unified
Memory bandwidth
1,229 GB/s
Memory upgradeable
No — soldered, decided at purchase
Architecture
ARM, 3nm TSMC
Form factor
Desktop
Operating system
macOS
Released
2026
Llama 3.1 8B Q4_K_M
59–123 tok/s

Worth knowing before you buy

  • Announced, not yet purchasable: Apple dates this configuration to late October 2026 and press reports say orders are slipping. Treat every figure here as pre-release.
  • Memory is soldered; the configuration cannot be changed after purchase.
  • The 512 GB configuration is the most unified memory available in any off-the-shelf machine.