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Device profile · macOS

Best local LLMs for Apple M4 Pro (48GB)

Apple M4 Pro (48GB) has ~32 GB usable for model weights and runs 59 of 67 popular models. Best tool: LM Studio.

Usable memory
~32 GB
Models run
59
Too large
8
Top pick
46.7B
Top pick Q4_K_M
Mixtral 8x7B Tight

Fits at Q4_K_M (~28.9 GB of ~32 GB usable) but with little headroom, close other apps.

Runs on Apple M4 Pro (48GB)

Compatible models 59 total

Too large for this device

Best way to run models on macOS

Runtime guide macOS

Beginner: LM Studio, Polished GUI, ships MLX on Apple Silicon, one-click model downloads.

Power user: mlx-lm, Apple's MLX framework, usually the fastest on Apple Silicon for the same quant.

vLLM is NOT a Mac tool, it is a CUDA/Linux serving engine. Unified memory is not a fixed VRAM slice; ~70% is usable for weights.

Full macOS tool guide →

FAQ

What is the best local LLM for Apple M4 Pro (48GB)?

Mixtral 8x7B is the strongest model that runs comfortably, using ~28.9 GB at Q4_K_M of the ~32 GB usable on Apple M4 Pro (48GB).

How much of Apple M4 Pro (48GB)'s memory can I use for a model?

About 32 GB. Apple Silicon shares one unified memory pool; roughly 66-75% is available to the GPU for model weights, the rest is reserved for macOS.

Which tool should I use on macOS?

LM Studio (Polished GUI, ships MLX on Apple Silicon, one-click model downloads.) or mlx-lm for speed. vLLM is NOT a Mac tool, it is a CUDA/Linux serving engine. Unified memory is not a fixed VRAM slice; ~70% is usable for weights.

Sources

Memory figures are estimates. See methodology.