Can StableLM 2 12B run on MacBook Pro M2 Max 96GB?

Q: Is unified memory on MacBook Pro M2 Max 96GB as fast as VRAM for StableLM 2 12B?

Not always. MacBook Pro M2 Max 96GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.

YES — Runs Great

C47Usable

Estimated from fit model

StableLM 2 12B needs ~32.1 GB VRAM. MacBook Pro M2 Max 96GB has 69.1 GB. With Q5_K_M quantization, expect ~25 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: StandardBottleneck: Balanced

Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q5_K_M (High quality) — 32.1 GB, 25.1 tok/s, Runs well

32.1 GB required69.1 GB available

46% VRAM used

Fit status

Runs well

Decode

25.1 tok/s

TTFT

7728 ms

Safe context

Memory

32.1 GB / 69.1 GB

Memory breakdown

Weights8.6 GB

KV Cache12.2 GB

Runtime0.9 GB

Headroom10.4 GB

See how fast it feels

See how fast it feelsStableLM 2 12B on MacBook Pro M2 Max 96GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.

When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.

Key benefits of running locally:
  - Full privacy: your prompts never leave your machine
  - No per-token cost or rate limits
  - Works offline once the model is downloaded
  - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:

  Model size     Q4 (4-bit)    Q8 (8-bit)    FP16
  7B params      ~4.3 GB       ~7.5 GB       ~14 GB
  13B params     ~7.9 GB       ~13.9 GB      ~26 GB
  70B params     ~42.7 GB      ~74.9 GB      ~140 GB

Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 25.1 tok/s decode · 7.7s TTFT (warm) · 63 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

Shared-memory contention still exists

The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.

Best improvement path

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Runs well	25.1 tok/s	4216 ms	4K
Coding	C	Runs well	25.1 tok/s	7728 ms	4K
Agentic Coding	C	Runs well	25.1 tok/s	11241 ms	4K
Reasoning	C	Runs well	25.1 tok/s	9134 ms	4K
RAG	C	Runs well	25.1 tok/s	14052 ms	4K

Quantization options

How StableLM 2 12B (12B params) fits at each quantization level on MacBook Pro M2 Max 96GB (69.1 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	4.7 GB	Low	D40
Q3_K_S	3	5.9 GB	Low	C40
NVFP4	4

Get started

Copy-paste commands to run StableLM 2 12B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
  --hf-repo "stabilityai/stablelm-2-12b-chat" \
  --hf-file "stablelm-2-12b-chat-Q5_K_M.gguf" \
  -c 4096 -ngl 99

Upgrade options

Hardware that runs StableLM 2 12B well

Mac Studio M2 Ultra 128GBBudget pick

128 GB Unified (+32)800 GB/s (+400)

Raises estimated decode speed by about 100%.50.1 tok/s decode

Raises estimated decode speed by about 100%.

Adds memory headroom for longer context windows and future model growth.

~$3,999 MSRP

Mac Studio M1 Ultra 128GBBest value

128 GB Unified (+32)800 GB/s (+400)

Raises estimated decode speed by about 89%.47.5 tok/s decode

Raises estimated decode speed by about 89%.

Adds memory headroom for longer context windows and future model growth.

~$3,999 MSRP

Frequently asked questions

Can MacBook Pro M2 Max 96GB run StableLM 2 12B?

Yes, MacBook Pro M2 Max 96GB can run StableLM 2 12B with a C grade (Runs well). Expected decode speed: 25.1 tok/s.

How much VRAM does StableLM 2 12B need?

StableLM 2 12B (12B parameters) requires approximately 32.1 GB of memory with Q5_K_M quantization.

What is the best quantization for StableLM 2 12B?

The recommended quantization for StableLM 2 12B is Q5_K_M, which balances quality and memory efficiency.

What speed will StableLM 2 12B run at on MacBook Pro M2 Max 96GB?

On MacBook Pro M2 Max 96GB, StableLM 2 12B achieves approximately 25.1 tokens per second decode speed with a time-to-first-token of 7728ms using Q5_K_M quantization.

Can MacBook Pro M2 Max 96GB run StableLM 2 12B for coding?

For coding workloads, StableLM 2 12B on MacBook Pro M2 Max 96GB receives a C grade with 25.1 tok/s and 4K context.

What context window can StableLM 2 12B use on MacBook Pro M2 Max 96GB?

On MacBook Pro M2 Max 96GB, StableLM 2 12B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

Is unified memory on MacBook Pro M2 Max 96GB as fast as VRAM for StableLM 2 12B?

See all results for MacBook Pro M2 Max 96GB See all hardware for StableLM 2 12B

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