Can Gemma 3 4B run on MacBook Pro M3 Pro 18GB?

YES — Runs Great

A74Great

Estimated from fit model

Gemma 3 4B needs ~7.7 GB VRAM. MacBook Pro M3 Pro 18GB has 13.0 GB. With Q4_K_M quantization, expect ~45 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: Very lowStack: BasicBottleneck: Memory bandwidth

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

Q4_K_M (Medium quality) — 7.7 GB, 47.1 tok/s, Runs well

7.7 GB required13.0 GB available

59% VRAM used

Fit status

Runs well

Decode

47.1 tok/s

TTFT

4109 ms

Safe context

57K

Memory

7.7 GB / 13.0 GB

Memory breakdown

Weights2.4 GB

KV Cache2.1 GB

Runtime1.2 GB

Headroom1.9 GB

See how fast it feels

See how fast it feelsGemma 3 4B on MacBook Pro M3 Pro 18GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.

Given information:
  - Speed = 60 mph (miles per hour)
  - Time  = 2.5 hours

Formula: Distance = Speed x Time

Calculation:
  Distance = 60 mph x 2.5 h
           = 150 miles

The train travels 150 miles.

Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.

Breakdown:
  - First half: 1.25 hours at 60 mph = 75 miles
  - Stop: 20 minutes (no distance)
  - Second half: 1.25 hours at 60 mph = 75 miles

Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph

The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 47.1 tok/s decode · 4.1s TTFT (warm) · 118 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	A	Runs well	47.1 tok/s	2241 ms	57K
Coding	A	Runs well	44.9 tok/s	4314 ms	57K
Agentic Coding	A	Runs well	47.1 tok/s	5976 ms	57K
Reasoning	A	Runs well	47.1 tok/s	4856 ms	57K
RAG	A	Runs well	47.1 tok/s	7470 ms	57K

Quantization options

How Gemma 3 4B (4B params) fits at each quantization level on MacBook Pro M3 Pro 18GB (13.0 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	1.6 GB	Low	B68
Q3_K_S	3	2.0 GB	Low	B69
NVFP4	4	2.2 GB	Medium	B69
Q4_K_M	4	2.4 GB	Medium	B69
Q5_K_M	5	2.9 GB	High	B70
Q6_K	6	3.3 GB	High	A70
Q8_0	8	4.3 GB	Very High	A71
F16Best for your GPU	16	8.2 GB	Maximum	A73

Get started

Copy-paste commands to run Gemma 3 4B on your machine.

Run

ollama run gemma3:4b

Your hardware

More models your MacBook Pro M3 Pro 18GB can run

Model	Params	Grade	Decode
Qwen 3.5 9B	9B	S	21.4 tok/s
Qwen 3 14B	14B	A	12 tok/s
Qwen 3 8B	8B	S	24.1 tok/s
Phi-4-reasoning-plus 14B	14.7B	A	10.3 tok/s
Nemotron Nano 8B	8B	S	24.1 tok/s

Frequently asked questions

Can MacBook Pro M3 Pro 18GB run Gemma 3 4B?

Yes, MacBook Pro M3 Pro 18GB can run Gemma 3 4B with a A grade (Runs well). Expected decode speed: 44.9 tok/s.

How much VRAM does Gemma 3 4B need?

Gemma 3 4B (4B parameters) requires approximately 7.7 GB of memory with Q4_K_M quantization.

What is the best quantization for Gemma 3 4B?

The recommended quantization for Gemma 3 4B is Q4_K_M, which balances quality and memory efficiency.

What speed will Gemma 3 4B run at on MacBook Pro M3 Pro 18GB?

On MacBook Pro M3 Pro 18GB, Gemma 3 4B achieves approximately 44.9 tokens per second decode speed with a time-to-first-token of 4314ms using Q4_K_M quantization.

Can MacBook Pro M3 Pro 18GB run Gemma 3 4B for coding?

For coding workloads, Gemma 3 4B on MacBook Pro M3 Pro 18GB receives a A grade with 44.9 tok/s and 57K context.

What context window can Gemma 3 4B use on MacBook Pro M3 Pro 18GB?

On MacBook Pro M3 Pro 18GB, Gemma 3 4B can safely use up to 57K tokens of context. The model's official context limit is 128K, but available memory constrains the safe maximum.

Is unified memory on MacBook Pro M3 Pro 18GB as fast as VRAM for Gemma 3 4B?

Not always. MacBook Pro M3 Pro 18GB 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.

See all results for MacBook Pro M3 Pro 18GB See all hardware for Gemma 3 4B

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