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text model · Gemma · macOS

Can I run Gemma 2 9B on Apple M5 Max (128GB)?

Compatibility verdict VRAM threshold engine
Yes, it runs GPU accelerated ~85 tok/s est.

Yes. Gemma 2 9B runs on Apple M5 Max (128GB) at Q4_K_M (~7.3 GB of ~96 GB usable).

Needs ~7.3 GB Device usable ~96 GB

Runs at Q4_K_M using ~7.3 GB of ~96 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 Max (128GB) leaves ~88.7 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed
~7.3 GB
Usable on device
~96 GB
Device memory
128 GB
Best quant
Q4_K_M
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Which quant fits

Quant ladder vs ~96 GB usable
Q2_K
~5.3 GB
Q3_K_M
~5.9 GB
Q4_K_M
~7.3 GB
Q5_K_M
~7.9 GB
Q6_K
~8.9 GB
Q8_0
~11.3 GB
FP16
~19.5 GB
The line marks Apple M5 Max (128GB)'s ~96 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 gemma2:9b
llama.cpp
$ llama-cli -hf bartowski/gemma-2-9b-it-GGUF:Q4_K_M
LM Studio
$ lms get bartowski/gemma-2-9b-it-GGUF
Model Gemma
Parameters
9B
Q4_K_M size
5.76 GB
Q8_0 size
9.83 GB
Context
8k
Ollama tag
gemma2:9b
Full Gemma 2 9B requirements →
Device macOS
Memory
128 GB unified
Usable for weights
~96 GB
Best runtime
MLX direct / Ollama (MLX backend)
Best models for Apple M5 Max (128GB) →

You could also run

Run Gemma 2 9B on other hardware

FAQ

Can Apple M5 Max (128GB) run Gemma 2 9B?

Yes. Gemma 2 9B runs on Apple M5 Max (128GB) at Q4_K_M (~7.3 GB of ~96 GB usable).

How much memory does Gemma 2 9B need?

Apple M5 Max (128GB) has room to spare. At Q4_K_M the weights are ~5.76 GB; with KV cache and runtime overhead, budget ~7.3 GB at a 4k context.

What is the best tool to run Gemma 2 9B 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.