text model · OLMo · macOS

Can I run OLMo 2 32B Instruct on Apple M5 (32GB)?

Compatibility verdict VRAM threshold engine

No, not enough memory would not load

No. OLMo 2 32B Instruct needs ~21.7 GB even at Q4_K_M, but Apple M5 (32GB) only has ~21 GB usable.

Needs ~21.7 GB Device usable ~21 GB

Needs ~21.7 GB even at Q4_K_M, but only ~21 GB is usable.

That figure is at a 4k context and moves about ±15% as context length changes.

The gap is about 0.7 GB: OLMo 2 32B Instruct needs roughly 21.7 GB at Q4_K_M and Apple M5 (32GB) leaves only about 21 GB usable for a model. The lightest tracked hardware that runs OLMo 2 32B Instruct is the Nvidia GeForce RTX 4090 (24GB) at 24 GB. See OLMo 2 32B Instruct on Nvidia GeForce RTX 4090 (24GB).

Q4_K_M needed: ~21.7 GB
Usable on device: ~21 GB
Device memory: 32 GB

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Which quant fits

Quant ladder vs ~21 GB usable

Q2_K

~15.6 GB

Q3_K_M

~17.8 GB

Q4_K_M

~21.7 GB

Q5_K_M

~25 GB

Q6_K

~28.4 GB

Q8_0

~36.5 GB

FP16

~66.7 GB

The line marks Apple M5 (32GB)'s ~21 GB budget; rungs past it are too large.

How to run it

On macOS use LM Studio (Polished GUI, ships MLX on Apple Silicon, one-click model downloads.).

Model OLMo

Parameters: 32B
Q4_K_M size: 19.5 GB
Q8_0 size: 34.3 GB
Context: 4k

Full OLMo 2 32B Instruct requirements →

Device macOS

Memory: 32 GB unified
Usable for weights: ~21 GB
Best runtime: MLX direct / Ollama (MLX backend)

Best models for Apple M5 (32GB) →

What you can run instead

Run OLMo 2 32B Instruct on other hardware

Nvidia GeForce RTX 4090 (24GB)Nvidia GeForce RTX 3090 (24GB)AMD Radeon RX 7900 XTX (24GB)Nvidia GeForce RTX 5090 (32GB)32GB RAM Laptop (CPU/iGPU only)Apple M4 Pro (48GB)

FAQ

Can Apple M5 (32GB) run OLMo 2 32B Instruct?

No. OLMo 2 32B Instruct needs ~21.7 GB even at Q4_K_M, but Apple M5 (32GB) only has ~21 GB usable.

How much memory does OLMo 2 32B Instruct need?

Apple M5 (32GB) does not have enough memory. At Q4_K_M the weights are ~19.5 GB; with KV cache and runtime overhead, budget ~21.7 GB at a 4k context.

What is the best tool to run OLMo 2 32B Instruct on macOS?

LM Studio for a simple setup; mlx-lm for the most 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.

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Markdown

[![OLMo 2 32B Instruct on Apple M5 (32GB)](https://localmodel.run/badge/olmo-2-32b/apple-m5-32gb.svg)](https://localmodel.run/can-i-run/olmo-2-32b/apple-m5-32gb)

Sources

Weights are measured from GGUF files; KV cache and overhead are computed, so totals can vary ~15% with context and runtime. Any tok/s is a bandwidth estimate. See methodology.