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Can I run LFM2 24B-A2B on Apple M4 Max (128GB)?

Compatibility verdict VRAM threshold engine
Yes, it runs GPU accelerated

Yes. LFM2 24B-A2B runs on Apple M4 Max (128GB) at Q4_K_M (~15.4 GB of ~96 GB usable).

Needs ~15.4 GB Device usable ~96 GB

Runs at Q4_K_M using ~15.4 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 M4 Max (128GB) leaves ~80.6 GB of headroom, room to step up to FP16 for higher quality.

Q4_K_M needed
~15.4 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
~12.1 GB
Q3_K_M
~13.7 GB
Q4_K_M
~15.4 GB
Q5_K_M
~19.1 GB
Q6_K
~21.7 GB
Q8_0
~25.6 GB
FP16
~46.4 GB
The line marks Apple M4 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 lfm2:24b
llama.cpp
$ llama-cli -hf LiquidAI/LFM2-24B-A2B-GGUF:Q4_K_M
LM Studio
$ lms get LiquidAI/LFM2-24B-A2B-GGUF
Model LFM
Parameters
24B (MoE, 2.3B active)
Q4_K_M size
13.43 GB
Q8_0 size
23.61 GB
Context
32k
Ollama tag
lfm2:24b
Full LFM2 24B-A2B requirements →
Device macOS
Memory
128 GB unified
Usable for weights
~96 GB
Power draw
~145 W
Best runtime
MLX direct / Ollama (MLX backend)
Best models for Apple M4 Max (128GB) →

You could also run

Run LFM2 24B-A2B on other hardware

FAQ

Can Apple M4 Max (128GB) run LFM2 24B-A2B?

Yes. LFM2 24B-A2B runs on Apple M4 Max (128GB) at Q4_K_M (~15.4 GB of ~96 GB usable).

How much memory does LFM2 24B-A2B need?

Apple M4 Max (128GB) has room to spare. At Q4_K_M the weights are ~13.43 GB; with KV cache and runtime overhead, budget ~15.4 GB at a 4k context. It is a Mixture-of-Experts model (24B total / 2.3B active), so all experts must stay in memory; memory tracks total params, not active params.

What is the best tool to run LFM2 24B-A2B 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.