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text model · Olmo · macOS

Can I run Olmo 3 7B Instruct on Apple M5 (32GB)?

Compatibility verdict VRAM threshold engine
Yes, it runs GPU accelerated ~29 tok/s est.

Yes. Olmo 3 7B Instruct runs on Apple M5 (32GB) at Q4_K_M (~5.6 GB of ~21 GB usable).

Needs ~5.6 GB Device usable ~21 GB

Runs at Q4_K_M using ~5.6 GB of ~21 GB usable. You have room for FP16 for higher quality.

That figure is at a 4k context and moves about ±15% as context length changes. Apple M5 (32GB) leaves ~15.4 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed
~5.6 GB
Usable on device
~21 GB
Device memory
32 GB
Best quant
Q4_K_M
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Which quant fits

Quant ladder vs ~21 GB usable
Q2_K
~4.3 GB
Q3_K_M
~4.8 GB
Q4_K_M
~5.6 GB
Q5_K_M
~6.4 GB
Q6_K
~7.1 GB
Q8_0
~8.6 GB
FP16
~16 GB
The line marks Apple M5 (32GB)'s ~21 GB budget; rungs past it are too large.

Run it

Install commands macOS

Pick your tool. All 3 load the same Q4_K_M weights.

Ollama
$ ollama run olmo-3:7b-instruct
llama.cpp
$ llama-cli -hf unsloth/Olmo-3-7B-Instruct-GGUF:Q4_K_M
LM Studio
$ lms get unsloth/Olmo-3-7B-Instruct-GGUF
Model Olmo
Parameters
7B
Q4_K_M size
4.16 GB
Q8_0 size
7.23 GB
Context
64k
Ollama tag
olmo-3:7b-instruct
Full Olmo 3 7B 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) →

You could also run

Run Olmo 3 7B Instruct on other hardware

FAQ

Can Apple M5 (32GB) run Olmo 3 7B Instruct?

Yes. Olmo 3 7B Instruct runs on Apple M5 (32GB) at Q4_K_M (~5.6 GB of ~21 GB usable).

How much memory does Olmo 3 7B Instruct need?

Apple M5 (32GB) has room to spare. At Q4_K_M the weights are ~4.16 GB; with KV cache and runtime overhead, budget ~5.6 GB at a 4k context.

What is the best tool to run Olmo 3 7B 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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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.